Confused pairs
Incorrect answers between two species (undirected). With a country selected, only mix-ups from games in that country are counted, and only pairs where both species are on that country's checklist are shown.
| Species A (lower id) | Species B (higher id) | Total wrong | A was target → picked B | B was target → picked A |
|---|---|---|---|---|
| Connecticut Warbler Oporornis agilis | Mourning Warbler Geothlypis philadelphia | 5 | 5 | 0 |
| Bonaparte's Gull Chroicocephalus philadelphia | Franklin's Gull Leucophaeus pipixcan | 4 | 3 | 1 |
| Glaucous-winged Gull Larus glaucescens | Iceland Gull Larus glaucoides | 4 | 1 | 3 |
| Least Flycatcher Empidonax minimus | Hammond's Flycatcher Empidonax hammondii | 4 | 0 | 4 |
| Canada Jay Perisoreus canadensis | Snow Bunting Plectrophenax nivalis | 4 | 3 | 1 |
| Hermit Thrush Catharus guttatus | Wood Thrush Hylocichla mustelina | 4 | 2 | 2 |
| Purple Finch Haemorhous purpureus | Cassin's Finch Haemorhous cassinii | 4 | 0 | 4 |
| Common Redpoll Acanthis flammea | Arctic Redpoll Acanthis hornemanni | 4 | 2 | 2 |
| Chipping Sparrow Spizella passerina | Clay-coloured Sparrow Spizella pallida | 4 | 0 | 4 |
| Snow Goose Anser caerulescens | Sandhill Crane Antigone canadensis | 3 | 1 | 2 |
| Cackling Goose Branta hutchinsii | Canada Goose Branta canadensis | 3 | 2 | 1 |
| Canada Goose Branta canadensis | Canada Jay Perisoreus canadensis | 3 | 1 | 2 |
| Mallard Anas platyrhynchos | Mottled Duck Anas fulvigula | 3 | 2 | 1 |
| Sandhill Crane Antigone canadensis | Whooping Crane Grus americana | 3 | 2 | 1 |
| Lesser Yellowlegs Tringa flavipes | Greater Yellowlegs Tringa melanoleuca | 3 | 0 | 3 |
| White-rumped Sandpiper Calidris fuscicollis | Least Sandpiper Calidris minutilla | 3 | 2 | 1 |
| Common Tern Sterna hirundo | Roseate Tern Sterna dougallii | 3 | 0 | 3 |
| Pacific Diver Gavia pacifica | Great Northern Diver Gavia immer | 3 | 0 | 3 |
| Laysan Albatross Phoebastria immutabilis | Short-tailed Albatross Phoebastria albatrus | 3 | 3 | 0 |
| Red-naped Sapsucker Sphyrapicus nuchalis | Red-breasted Sapsucker Sphyrapicus ruber | 3 | 1 | 2 |
| Loggerhead Shrike Lanius ludovicianus | Northern Shrike Lanius borealis | 3 | 1 | 2 |
| Snow Goose Anser caerulescens | Canada Jay Perisoreus canadensis | 3 | 0 | 3 |
| Boreal Chickadee Poecile hudsonicus | Siberian Tit Poecile cinctus | 3 | 1 | 2 |
| Pacific Wren Troglodytes pacificus | Winter Wren Troglodytes hiemalis | 3 | 2 | 1 |
| Grey-cheeked Thrush Catharus minimus | Swainson's Thrush Catharus ustulatus | 3 | 1 | 2 |
| Black-throated Sparrow Amphispiza bilineata | Lark Bunting Calamospiza melanocorys | 3 | 2 | 1 |
| Lark Sparrow Chondestes grammacus | Lark Bunting Calamospiza melanocorys | 3 | 1 | 2 |
| Brewer's Blackbird Euphagus cyanocephalus | Common Grackle Quiscalus quiscula | 3 | 3 | 0 |
| MacGillivray's Warbler Geothlypis tolmiei | Mourning Warbler Geothlypis philadelphia | 3 | 1 | 2 |
| Black-throated Green Warbler Setophaga virens | Canada Warbler Cardellina canadensis | 3 | 3 | 0 |
| Greater White-fronted Goose Anser albifrons | Cackling Goose Branta hutchinsii | 2 | 2 | 0 |
| Trumpeter Swan Cygnus buccinator | Bewick's Swan Cygnus columbianus | 2 | 1 | 1 |
| Cinnamon Teal Spatula cyanoptera | Northern Shoveler Spatula clypeata | 2 | 1 | 1 |
| White-winged Scoter Melanitta deglandi | Black Scoter Melanitta americana | 2 | 2 | 0 |
| Common Goldeneye Bucephala clangula | Barrow's Goldeneye Bucephala islandica | 2 | 1 | 1 |
| Goosander Mergus merganser | Red-breasted Merganser Mergus serrator | 2 | 1 | 1 |
| Sooty Grouse Dendragapus fuliginosus | Sharp-tailed Grouse Tympanuchus phasianellus | 2 | 2 | 0 |
| Sooty Grouse Dendragapus fuliginosus | Willow Ptarmigan Lagopus lagopus | 2 | 2 | 0 |
| Black-necked Grebe Podiceps nigricollis | Western Grebe Aechmophorus occidentalis | 2 | 2 | 0 |
| Common Poorwill Phalaenoptilus nuttallii | Eastern Whip-poor-will Antrostomus vociferus | 2 | 2 | 0 |
| Anna's Hummingbird Calypte anna | Costa's Hummingbird Calypte costae | 2 | 1 | 1 |
| Ruby-throated Hummingbird Archilochus colubris | Rufous Hummingbird Selasphorus rufus | 2 | 0 | 2 |
| King Rail Rallus elegans | Virginia Rail Rallus limicola | 2 | 2 | 0 |
| Virginia Rail Rallus limicola | Sora Porzana carolina | 2 | 1 | 1 |
| Eurasian Oystercatcher Haematopus ostralegus | American Oystercatcher Haematopus palliatus | 2 | 2 | 0 |
| Common Ringed Plover Charadrius hiaticula | Semipalmated Plover Charadrius semipalmatus | 2 | 2 | 0 |
| Long-billed Curlew Numenius americanus | Slender-billed Curlew Numenius tenuirostris | 2 | 1 | 1 |
| Short-billed Dowitcher Limnodromus griseus | Long-billed Dowitcher Limnodromus scolopaceus | 2 | 1 | 1 |
| Grey Phalarope Phalaropus fulicarius | Red-necked Phalarope Phalaropus lobatus | 2 | 2 | 0 |
| Wilson's Phalarope Phalaropus tricolor | Red-necked Phalarope Phalaropus lobatus | 2 | 0 | 2 |
| Surfbird Calidris virgata | Stilt Sandpiper Calidris himantopus | 2 | 2 | 0 |
| Ruff Calidris pugnax | Stilt Sandpiper Calidris himantopus | 2 | 1 | 1 |
| Sanderling Calidris alba | Baird's Sandpiper Calidris bairdii | 2 | 0 | 2 |
| Least Sandpiper Calidris minutilla | Western Sandpiper Calidris mauri | 2 | 1 | 1 |
| Least Sandpiper Calidris minutilla | Semipalmated Sandpiper Calidris pusilla | 2 | 2 | 0 |
| Long-tailed Skua Stercorarius longicaudus | Pomarine Skua Stercorarius pomarinus | 2 | 0 | 2 |
| Arctic Skua Stercorarius parasiticus | Pomarine Skua Stercorarius pomarinus | 2 | 0 | 2 |
| Atlantic Puffin Fratercula arctica | Horned Puffin Fratercula corniculata | 2 | 0 | 2 |
| Marbled Murrelet Brachyramphus marmoratus | Pigeon Guillemot Cepphus columba | 2 | 1 | 1 |
| Black Guillemot Cepphus grylle | Pigeon Guillemot Cepphus columba | 2 | 1 | 1 |
| Pigeon Guillemot Cepphus columba | Common Guillemot Uria aalge | 2 | 2 | 0 |
| Laughing Gull Leucophaeus atricilla | Franklin's Gull Leucophaeus pipixcan | 2 | 1 | 1 |
| Ring-billed Gull Larus delawarensis | Herring Gull Larus argentatus | 2 | 1 | 1 |
| Herring Gull Larus argentatus | Great Black-backed Gull Larus marinus | 2 | 1 | 1 |
| Great Black-backed Gull Larus marinus | Lesser Black-backed Gull Larus fuscus | 2 | 2 | 0 |
| California Gull Larus californicus | Iceland Gull Larus glaucoides | 2 | 2 | 0 |
| Forster's Tern Sterna forsteri | Arctic Tern Sterna paradisaea | 2 | 1 | 1 |
| Forster's Tern Sterna forsteri | Common Tern Sterna hirundo | 2 | 2 | 0 |
| Arctic Tern Sterna paradisaea | Common Tern Sterna hirundo | 2 | 1 | 1 |
| White-billed Diver Gavia adamsii | Short-tailed Albatross Phoebastria albatrus | 2 | 2 | 0 |
| Flesh-footed Shearwater Ardenna carneipes | Great Shearwater Ardenna gravis | 2 | 0 | 2 |
| Buller's Shearwater Ardenna bulleri | Short-tailed Shearwater Ardenna tenuirostris | 2 | 1 | 1 |
| Northern Gannet Morus bassanus | Brandt's Cormorant Urile penicillatus | 2 | 0 | 2 |
| Brandt's Cormorant Urile penicillatus | Pelagic Cormorant Urile pelagicus | 2 | 1 | 1 |
| Pelagic Cormorant Urile pelagicus | Double-crested Cormorant Nannopterum auritum | 2 | 1 | 1 |
| Great Cormorant Phalacrocorax carbo | Double-crested Cormorant Nannopterum auritum | 2 | 1 | 1 |
| Broad-winged Hawk Buteo platypterus | Swainson's Hawk Buteo swainsoni | 2 | 1 | 1 |
| Broad-winged Hawk Buteo platypterus | Red-tailed Hawk Buteo jamaicensis | 2 | 2 | 0 |
| Swainson's Hawk Buteo swainsoni | Rough-legged Buzzard Buteo lagopus | 2 | 1 | 1 |
| Red-tailed Hawk Buteo jamaicensis | Rough-legged Buzzard Buteo lagopus | 2 | 2 | 0 |
| Flammulated Owl Psiloscops flammeolus | Western Screech-Owl Megascops kennicottii | 2 | 2 | 0 |
| Northern Pygmy-Owl Glaucidium gnoma | Spotted Owl Strix occidentalis | 2 | 1 | 1 |
| Spotted Owl Strix occidentalis | Barred Owl Strix varia | 2 | 2 | 0 |
| Lewis's Woodpecker Melanerpes lewis | Red-bellied Woodpecker Melanerpes carolinus | 2 | 2 | 0 |
| American Three-toed Woodpecker Picoides dorsalis | Black-backed Woodpecker Picoides arcticus | 2 | 0 | 2 |
| Olive-sided Flycatcher Contopus cooperi | Western Wood-Pewee Contopus sordidulus | 2 | 0 | 2 |
| Western Wood-Pewee Contopus sordidulus | Eastern Wood-Pewee Contopus virens | 2 | 1 | 1 |
| Alder Flycatcher Empidonax alnorum | Willow Flycatcher Empidonax traillii | 2 | 0 | 2 |
| Dusky Flycatcher Empidonax oberholseri | Eastern Phoebe Sayornis phoebe | 2 | 1 | 1 |
| Western Flycatcher Empidonax difficilis | Eastern Phoebe Sayornis phoebe | 2 | 0 | 2 |
| Western Kingbird Tyrannus verticalis | Eastern Kingbird Tyrannus tyrannus | 2 | 1 | 1 |
| Mountain Chickadee Poecile gambeli | Boreal Chickadee Poecile hudsonicus | 2 | 2 | 0 |
| Northern Rough-winged Swallow Stelgidopteryx serripennis | Cliff Swallow Petrochelidon pyrrhonota | 2 | 1 | 1 |
| Brown Thrasher Toxostoma rufum | Sage Thrasher Oreoscoptes montanus | 2 | 0 | 2 |
| Veery Catharus fuscescens | Grey-cheeked Thrush Catharus minimus | 2 | 0 | 2 |
| Common Raven Corvus corax | American Robin Turdus migratorius | 2 | 0 | 2 |
| Bohemian Waxwing Bombycilla garrulus | Cedar Waxwing Bombycilla cedrorum | 2 | 1 | 1 |
| Evening Grosbeak Hesperiphona vespertina | Pine Grosbeak Pinicola enucleator | 2 | 0 | 2 |
| Lapland Bunting Calcarius lapponicus | Chestnut-collared Longspur Calcarius ornatus | 2 | 1 | 1 |
| Bachman's Sparrow Peucaea aestivalis | Grasshopper Sparrow Ammodramus savannarum | 2 | 2 | 0 |
| Bachman's Sparrow Peucaea aestivalis | Chipping Sparrow Spizella passerina | 2 | 2 | 0 |
| American Tree Sparrow Spizelloides arborea | Fox Sparrow Passerella iliaca | 2 | 2 | 0 |
| American Tree Sparrow Spizelloides arborea | Dark-eyed Junco Junco hyemalis | 2 | 2 | 0 |
| Savannah Sparrow Passerculus sandwichensis | Baird's Sparrow Centronyx bairdii | 2 | 0 | 2 |
| Song Sparrow Melospiza melodia | Swamp Sparrow Melospiza georgiana | 2 | 0 | 2 |
| Bullock's Oriole Icterus bullockii | Baltimore Oriole Icterus galbula | 2 | 1 | 1 |
| Ovenbird Seiurus aurocapilla | Louisiana Waterthrush Parkesia motacilla | 2 | 0 | 2 |
| Ovenbird Seiurus aurocapilla | Northern Waterthrush Parkesia noveboracensis | 2 | 0 | 2 |
| Tennessee Warbler Leiothlypis peregrina | Orange-crowned Warbler Leiothlypis celata | 2 | 2 | 0 |
| Connecticut Warbler Oporornis agilis | MacGillivray's Warbler Geothlypis tolmiei | 2 | 1 | 1 |
| Blackpoll Warbler Setophaga striata | Palm Warbler Setophaga palmarum | 2 | 1 | 1 |
| Yellow-rumped Warbler Setophaga coronata | Townsend's Warbler Setophaga townsendi | 2 | 1 | 1 |
| Yellow-throated Warbler Setophaga dominica | Grace's Warbler Setophaga graciae | 2 | 0 | 2 |
| Scarlet Tanager Piranga olivacea | Western Tanager Piranga ludoviciana | 2 | 2 | 0 |
| Wilson's Warbler Cardellina pusilla | Indigo Bunting Passerina cyanea | 2 | 0 | 2 |
| Snow Goose Anser caerulescens | Ross's Goose Anser rossii | 1 | 0 | 1 |
| Ross's Goose Anser rossii | Greater White-fronted Goose Anser albifrons | 1 | 0 | 1 |
| Brent Goose Branta bernicla | Western Wood-Pewee Contopus sordidulus | 1 | 1 | 0 |
| Canada Goose Branta canadensis | Sandhill Crane Antigone canadensis | 1 | 1 | 0 |
| Canada Goose Branta canadensis | Snow Bunting Plectrophenax nivalis | 1 | 1 | 0 |
| Wood Duck Aix sponsa | Baikal Teal Sibirionetta formosa | 1 | 0 | 1 |
| Blue-winged Teal Spatula discors | American Wigeon Mareca americana | 1 | 1 | 0 |
| Wood Duck Aix sponsa | Cinnamon Teal Spatula cyanoptera | 1 | 0 | 1 |
| Northern Shoveler Spatula clypeata | Mallard Anas platyrhynchos | 1 | 1 | 0 |
| Blue-winged Teal Spatula discors | Gadwall Mareca strepera | 1 | 0 | 1 |
| Gadwall Mareca strepera | Flesh-footed Shearwater Ardenna carneipes | 1 | 1 | 0 |
| Falcated Duck Mareca falcata | Eurasian Wigeon Mareca penelope | 1 | 1 | 0 |
| Falcated Duck Mareca falcata | American Wigeon Mareca americana | 1 | 1 | 0 |
| Falcated Duck Mareca falcata | Eurasian/Green-winged Teal Anas crecca | 1 | 1 | 0 |
| Eurasian Wigeon Mareca penelope | Western Grebe Aechmophorus occidentalis | 1 | 1 | 0 |
| Eurasian Wigeon Mareca penelope | American Wigeon Mareca americana | 1 | 0 | 1 |
| Northern Pintail Anas acuta | Harlequin Duck Histrionicus histrionicus | 1 | 1 | 0 |
| Northern Pintail Anas acuta | Dark-eyed Junco Junco hyemalis | 1 | 1 | 0 |
| Eurasian/Green-winged Teal Anas crecca | Canvasback Aythya valisineria | 1 | 1 | 0 |
| Canvasback Aythya valisineria | Lapland Bunting Calcarius lapponicus | 1 | 1 | 0 |
| Ring-necked Duck Aythya collaris | Pomarine Skua Stercorarius pomarinus | 1 | 1 | 0 |
| Tufted Duck Aythya fuligula | Greater Scaup Aythya marila | 1 | 1 | 0 |
| Greater Scaup Aythya marila | Labrador Duck Camptorhynchus labradorius | 1 | 1 | 0 |
| Greater Scaup Aythya marila | Lesser Scaup Aythya affinis | 1 | 0 | 1 |
| Lesser Scaup Aythya affinis | Curve-billed Thrasher Toxostoma curvirostre | 1 | 1 | 0 |
| King Eider Somateria spectabilis | Surf Scoter Melanitta perspicillata | 1 | 1 | 0 |
| King Eider Somateria spectabilis | Buller's Shearwater Ardenna bulleri | 1 | 1 | 0 |
| Common Eider Somateria mollissima | White-winged Scoter Melanitta deglandi | 1 | 1 | 0 |
| Harlequin Duck Histrionicus histrionicus | Black Scoter Melanitta americana | 1 | 1 | 0 |
| White-winged Scoter Melanitta deglandi | Common Scoter Melanitta nigra | 1 | 1 | 0 |
| Wood Duck Aix sponsa | Long-tailed Duck Clangula hyemalis | 1 | 0 | 1 |
| Long-tailed Duck Clangula hyemalis | Elegant Tern Thalasseus elegans | 1 | 1 | 0 |
| Black Scoter Melanitta americana | Bufflehead Bucephala albeola | 1 | 0 | 1 |
| Red-breasted Merganser Mergus serrator | Barred Owl Strix varia | 1 | 1 | 0 |
| Red-breasted Merganser Mergus serrator | Ruddy Duck Oxyura jamaicensis | 1 | 0 | 1 |
| Northern Bobwhite Colinus virginianus | Greater Sage-Grouse Centrocercus urophasianus | 1 | 1 | 0 |
| Northern Bobwhite Colinus virginianus | Grey-tailed Tattler Tringa brevipes | 1 | 1 | 0 |
| Northern Bobwhite Colinus virginianus | Lesser Yellowlegs Tringa flavipes | 1 | 1 | 0 |
| Northern Bobwhite Colinus virginianus | Wild Turkey Meleagris gallopavo | 1 | 0 | 1 |
| Wild Turkey Meleagris gallopavo | Sharp-tailed Grouse Tympanuchus phasianellus | 1 | 1 | 0 |
| Ruffed Grouse Bonasa umbellus | Greater Sage-Grouse Centrocercus urophasianus | 1 | 1 | 0 |
| Ruffed Grouse Bonasa umbellus | Sharp-tailed Grouse Tympanuchus phasianellus | 1 | 1 | 0 |
| Ruffed Grouse Bonasa umbellus | Dusky Grouse Dendragapus obscurus | 1 | 0 | 1 |
| Ruffed Grouse Bonasa umbellus | Sooty Grouse Dendragapus fuliginosus | 1 | 0 | 1 |
| Sooty Grouse Dendragapus fuliginosus | White-tailed Ptarmigan Lagopus leucura | 1 | 0 | 1 |
| White-tailed Ptarmigan Lagopus leucura | Willow Ptarmigan Lagopus lagopus | 1 | 1 | 0 |
| White-tailed Ptarmigan Lagopus leucura | Rock Ptarmigan Lagopus muta | 1 | 1 | 0 |
| White-tailed Ptarmigan Lagopus leucura | Spruce Grouse Canachites canadensis | 1 | 1 | 0 |
| Willow Ptarmigan Lagopus lagopus | Mottled Petrel Pterodroma inexpectata | 1 | 1 | 0 |
| Willow Ptarmigan Lagopus lagopus | Rock Ptarmigan Lagopus muta | 1 | 0 | 1 |
| Rock Ptarmigan Lagopus muta | Spruce Grouse Canachites canadensis | 1 | 1 | 0 |
| Slavonian Grebe Podiceps auritus | Red-necked Grebe Podiceps grisegena | 1 | 1 | 0 |
| Red-necked Grebe Podiceps grisegena | Great Cormorant Phalacrocorax carbo | 1 | 1 | 0 |
| Western Grebe Aechmophorus occidentalis | Clark's Grebe Aechmophorus clarkii | 1 | 0 | 1 |
| Clark's Grebe Aechmophorus clarkii | Sooty Shearwater Ardenna grisea | 1 | 1 | 0 |
| Rufous Turtle Dove Streptopelia orientalis | Eastern Phoebe Sayornis phoebe | 1 | 1 | 0 |
| Common Ground Dove Columbina passerina | Mourning Dove Zenaida macroura | 1 | 0 | 1 |
| Yellow-billed Cuckoo Coccyzus americanus | Great-tailed Grackle Quiscalus mexicanus | 1 | 1 | 0 |
| Black-billed Cuckoo Coccyzus erythropthalmus | Golden-crowned Kinglet Regulus satrapa | 1 | 1 | 0 |
| Common Cuckoo Cuculus canorus | Seaside Sparrow Ammospiza maritima | 1 | 1 | 0 |
| Common Poorwill Phalaenoptilus nuttallii | Golden-crowned Sparrow Zonotrichia atricapilla | 1 | 1 | 0 |
| Common Nighthawk Chordeiles minor | Chuck-will's-widow Antrostomus carolinensis | 1 | 0 | 1 |
| Common Nighthawk Chordeiles minor | Eastern Whip-poor-will Antrostomus vociferus | 1 | 0 | 1 |
| Eastern Whip-poor-will Antrostomus vociferus | European Golden Plover Pluvialis apricaria | 1 | 1 | 0 |
| Eastern Whip-poor-will Antrostomus vociferus | Black Skimmer Rynchops niger | 1 | 1 | 0 |
| Common Nighthawk Chordeiles minor | Black Swift Cypseloides niger | 1 | 0 | 1 |
| Black Swift Cypseloides niger | Vaux's Swift Chaetura vauxi | 1 | 1 | 0 |
| Chimney Swift Chaetura pelagica | Vaux's Swift Chaetura vauxi | 1 | 1 | 0 |
| Chimney Swift Chaetura pelagica | Common Swift Apus apus | 1 | 1 | 0 |
| Vaux's Swift Chaetura vauxi | Calliope Hummingbird Selasphorus calliope | 1 | 1 | 0 |
| Vaux's Swift Chaetura vauxi | American Avocet Recurvirostra americana | 1 | 1 | 0 |
| Vaux's Swift Chaetura vauxi | Peregrine Falcon Falco peregrinus | 1 | 1 | 0 |
| American Wigeon Mareca americana | Common Swift Apus apus | 1 | 0 | 1 |
| Common Swift Apus apus | White-throated Swift Aeronautes saxatalis | 1 | 0 | 1 |
| Mexican Violetear Colibri thalassinus | Amethyst-throated Mountain-gem Lampornis amethystinus | 1 | 1 | 0 |
| Mexican Violetear Colibri thalassinus | Black-chinned Hummingbird Archilochus alexandri | 1 | 1 | 0 |
| Ruby-throated Hummingbird Archilochus colubris | Black-chinned Hummingbird Archilochus alexandri | 1 | 0 | 1 |
| Ruby-throated Hummingbird Archilochus colubris | Anna's Hummingbird Calypte anna | 1 | 0 | 1 |
| Anna's Hummingbird Calypte anna | Rufous Hummingbird Selasphorus rufus | 1 | 0 | 1 |
| Rufous Hummingbird Selasphorus rufus | Broad-tailed Hummingbird Selasphorus platycercus | 1 | 0 | 1 |
| Rufous Hummingbird Selasphorus rufus | Broad-billed Hummingbird Cynanthus latirostris | 1 | 0 | 1 |
| Broad-tailed Hummingbird Selasphorus platycercus | Broad-billed Hummingbird Cynanthus latirostris | 1 | 0 | 1 |
| King Rail Rallus elegans | Orchard Oriole Icterus spurius | 1 | 1 | 0 |
| King Rail Rallus elegans | Clapper Rail Rallus crepitans | 1 | 0 | 1 |
| Corncrake Crex crex | Sora Porzana carolina | 1 | 1 | 0 |
| Sora Porzana carolina | American Coot Fulica americana | 1 | 1 | 0 |
| Sora Porzana carolina | Small-billed Elaenia Elaenia parvirostris | 1 | 1 | 0 |
| King Eider Somateria spectabilis | American Moorhen Gallinula galeata | 1 | 0 | 1 |
| Yellow Rail Coturnicops noveboracensis | Wilson's Snipe Gallinago delicata | 1 | 1 | 0 |
| Sora Porzana carolina | Whooping Crane Grus americana | 1 | 0 | 1 |
| Black-necked Stilt Himantopus mexicanus | American Avocet Recurvirostra americana | 1 | 1 | 0 |
| Black-necked Stilt Himantopus mexicanus | Grey Plover Pluvialis squatarola | 1 | 1 | 0 |
| Black-necked Stilt Himantopus mexicanus | Eurasian Jackdaw Coloeus monedula | 1 | 1 | 0 |
| American Avocet Recurvirostra americana | American Golden Plover Pluvialis dominica | 1 | 1 | 0 |
| Eurasian Oystercatcher Haematopus ostralegus | Grey Plover Pluvialis squatarola | 1 | 1 | 0 |
| Grey Plover Pluvialis squatarola | Semipalmated Plover Charadrius semipalmatus | 1 | 1 | 0 |
| European Golden Plover Pluvialis apricaria | Pacific Golden Plover Pluvialis fulva | 1 | 1 | 0 |
| Surf Scoter Melanitta perspicillata | American Golden Plover Pluvialis dominica | 1 | 0 | 1 |
| Grey Plover Pluvialis squatarola | American Golden Plover Pluvialis dominica | 1 | 0 | 1 |
| American Golden Plover Pluvialis dominica | Common Ringed Plover Charadrius hiaticula | 1 | 1 | 0 |
| American Golden Plover Pluvialis dominica | Western Sandpiper Calidris mauri | 1 | 1 | 0 |
| Ruffed Grouse Bonasa umbellus | Eurasian Dotterel Eudromias morinellus | 1 | 0 | 1 |
| Killdeer Charadrius vociferus | Common Ringed Plover Charadrius hiaticula | 1 | 1 | 0 |
| Common Ringed Plover Charadrius hiaticula | Piping Plover Charadrius melodus | 1 | 1 | 0 |
| Semipalmated Plover Charadrius semipalmatus | Northern Lapwing Vanellus vanellus | 1 | 1 | 0 |
| Piping Plover Charadrius melodus | Siberian Sand Plover Anarhynchus mongolus | 1 | 0 | 1 |
| Siberian Sand Plover Anarhynchus mongolus | Wilson's Plover Anarhynchus wilsonia | 1 | 0 | 1 |
| Wilson's Plover Anarhynchus wilsonia | Snowy Plover Anarhynchus nivosus | 1 | 1 | 0 |
| Common Ringed Plover Charadrius hiaticula | Snowy Plover Anarhynchus nivosus | 1 | 0 | 1 |
| Greater Prairie-Chicken Tympanuchus cupido | Upland Sandpiper Bartramia longicauda | 1 | 0 | 1 |
| Upland Sandpiper Bartramia longicauda | Sooty Shearwater Ardenna grisea | 1 | 1 | 0 |
| Bristle-thighed Curlew Numenius tahitiensis | Marsh Sandpiper Tringa stagnatilis | 1 | 1 | 0 |
| Whimbrel Numenius phaeopus | Fish Crow Corvus ossifragus | 1 | 1 | 0 |
| Whimbrel Numenius phaeopus | Long-billed Curlew Numenius americanus | 1 | 0 | 1 |
| Long-billed Curlew Numenius americanus | Eurasian Curlew Numenius arquata | 1 | 1 | 0 |
| Long-billed Curlew Numenius americanus | Hudsonian Godwit Limosa haemastica | 1 | 1 | 0 |
| Long-billed Curlew Numenius americanus | Marbled Godwit Limosa fedoa | 1 | 1 | 0 |
| Hudsonian Godwit Limosa haemastica | Marbled Godwit Limosa fedoa | 1 | 0 | 1 |
| Marbled Godwit Limosa fedoa | Long-billed Dowitcher Limnodromus scolopaceus | 1 | 0 | 1 |
| American Woodcock Scolopax minor | Wilson's Snipe Gallinago delicata | 1 | 1 | 0 |
| Taiga Bean Goose Anser fabalis | Common Snipe Gallinago gallinago | 1 | 0 | 1 |
| Wilson's Phalarope Phalaropus tricolor | Spotted Owl Strix occidentalis | 1 | 1 | 0 |
| Wilson's Phalarope Phalaropus tricolor | Grey Phalarope Phalaropus fulicarius | 1 | 0 | 1 |
| Grey Phalarope Phalaropus fulicarius | Spotted Towhee Pipilo maculatus | 1 | 1 | 0 |
| Black Oystercatcher Haematopus bachmani | Red-necked Phalarope Phalaropus lobatus | 1 | 0 | 1 |
| Terek Sandpiper Xenus cinereus | Solitary Sandpiper Tringa solitaria | 1 | 1 | 0 |
| Spotted Sandpiper Actitis macularius | Solitary Sandpiper Tringa solitaria | 1 | 1 | 0 |
| Solitary Sandpiper Tringa solitaria | Lesser Yellowlegs Tringa flavipes | 1 | 1 | 0 |
| Solitary Sandpiper Tringa solitaria | Willet Tringa semipalmata | 1 | 1 | 0 |
| Solitary Sandpiper Tringa solitaria | Greater Yellowlegs Tringa melanoleuca | 1 | 1 | 0 |
| Solitary Sandpiper Tringa solitaria | Townsend's Warbler Setophaga townsendi | 1 | 1 | 0 |
| Grey-tailed Tattler Tringa brevipes | Wandering Tattler Tringa incana | 1 | 0 | 1 |
| Wandering Tattler Tringa incana | Wood Sandpiper Tringa glareola | 1 | 1 | 0 |
| Grey-tailed Tattler Tringa brevipes | Marsh Sandpiper Tringa stagnatilis | 1 | 0 | 1 |
| Wandering Tattler Tringa incana | Willet Tringa semipalmata | 1 | 0 | 1 |
| Marsh Sandpiper Tringa stagnatilis | Common Greenshank Tringa nebularia | 1 | 0 | 1 |
| Ruddy Turnstone Arenaria interpres | Iceland Gull Larus glaucoides | 1 | 1 | 0 |
| Red Knot Calidris canutus | Sharp-tailed Sandpiper Calidris acuminata | 1 | 1 | 0 |
| Black Oystercatcher Haematopus bachmani | Surfbird Calidris virgata | 1 | 0 | 1 |
| Surfbird Calidris virgata | Sanderling Calidris alba | 1 | 1 | 0 |
| Sharp-tailed Sandpiper Calidris acuminata | Curlew Sandpiper Calidris ferruginea | 1 | 1 | 0 |
| Stilt Sandpiper Calidris himantopus | Sanderling Calidris alba | 1 | 1 | 0 |
| Ruff Calidris pugnax | Sanderling Calidris alba | 1 | 0 | 1 |
| Buff-breasted Sandpiper Calidris subruficollis | Sanderling Calidris alba | 1 | 0 | 1 |
| Sanderling Calidris alba | Dunlin Calidris alpina | 1 | 0 | 1 |
| Dunlin Calidris alpina | Purple Sandpiper Calidris maritima | 1 | 1 | 0 |
| Dunlin Calidris alpina | MacGillivray's Warbler Geothlypis tolmiei | 1 | 1 | 0 |
| Sanderling Calidris alba | Purple Sandpiper Calidris maritima | 1 | 0 | 1 |
| Whooping Crane Grus americana | Baird's Sandpiper Calidris bairdii | 1 | 0 | 1 |
| Baird's Sandpiper Calidris bairdii | Least Sandpiper Calidris minutilla | 1 | 1 | 0 |
| White-rumped Sandpiper Calidris fuscicollis | Western Sandpiper Calidris mauri | 1 | 1 | 0 |
| Sora Porzana carolina | Least Sandpiper Calidris minutilla | 1 | 0 | 1 |
| Western Sandpiper Calidris mauri | Semipalmated Sandpiper Calidris pusilla | 1 | 0 | 1 |
| Semipalmated Sandpiper Calidris pusilla | Long-tailed Skua Stercorarius longicaudus | 1 | 0 | 1 |
| Black Scoter Melanitta americana | Arctic Skua Stercorarius parasiticus | 1 | 0 | 1 |
| American Avocet Recurvirostra americana | Arctic Skua Stercorarius parasiticus | 1 | 0 | 1 |
| Arctic Skua Stercorarius parasiticus | Great Skua Stercorarius skua | 1 | 0 | 1 |
| Rhinoceros Auklet Cerorhinca monocerata | Marbled Murrelet Brachyramphus marmoratus | 1 | 1 | 0 |
| Rhinoceros Auklet Cerorhinca monocerata | Brown Creeper Certhia americana | 1 | 1 | 0 |
| Rhinoceros Auklet Cerorhinca monocerata | Swainson's Thrush Catharus ustulatus | 1 | 1 | 0 |
| Cassin's Auklet Ptychoramphus aleuticus | Marbled Murrelet Brachyramphus marmoratus | 1 | 1 | 0 |
| Cassin's Auklet Ptychoramphus aleuticus | Black Guillemot Cepphus grylle | 1 | 1 | 0 |
| Crested Auklet Aethia cristatella | Parakeet Auklet Aethia psittacula | 1 | 1 | 0 |
| Crested Auklet Aethia cristatella | Long-billed Murrelet Brachyramphus perdix | 1 | 1 | 0 |
| Wilson's Phalarope Phalaropus tricolor | Marbled Murrelet Brachyramphus marmoratus | 1 | 0 | 1 |
| Pigeon Guillemot Cepphus columba | Laysan Albatross Phoebastria immutabilis | 1 | 1 | 0 |
| Goosander Mergus merganser | Razorbill Alca torda | 1 | 0 | 1 |
| Black Guillemot Cepphus grylle | Razorbill Alca torda | 1 | 0 | 1 |
| Great Skua Stercorarius skua | Common Guillemot Uria aalge | 1 | 0 | 1 |
| Razorbill Alca torda | Common Guillemot Uria aalge | 1 | 0 | 1 |
| Brünnich's Guillemot Uria lomvia | Common Guillemot Uria aalge | 1 | 0 | 1 |
| Common Guillemot Uria aalge | Scripps's Murrelet Synthliboramphus scrippsi | 1 | 1 | 0 |
| Surf Scoter Melanitta perspicillata | Ancient Murrelet Synthliboramphus antiquus | 1 | 0 | 1 |
| Brünnich's Guillemot Uria lomvia | Ancient Murrelet Synthliboramphus antiquus | 1 | 0 | 1 |
| Northern Bobwhite Colinus virginianus | Guadalupe Murrelet Synthliboramphus hypoleucus | 1 | 0 | 1 |
| Common Guillemot Uria aalge | Black-legged Kittiwake Rissa tridactyla | 1 | 0 | 1 |
| Red-legged Kittiwake Rissa brevirostris | Sabine's Gull Xema sabini | 1 | 1 | 0 |
| Ivory Gull Pagophila eburnea | Pink-footed Shearwater Ardenna creatopus | 1 | 1 | 0 |
| Black-legged Kittiwake Rissa tridactyla | Sabine's Gull Xema sabini | 1 | 0 | 1 |
| Sabine's Gull Xema sabini | Bonaparte's Gull Chroicocephalus philadelphia | 1 | 1 | 0 |
| Ivory Gull Pagophila eburnea | Bonaparte's Gull Chroicocephalus philadelphia | 1 | 0 | 1 |
| Bonaparte's Gull Chroicocephalus philadelphia | Short-billed Gull Larus brachyrhynchus | 1 | 1 | 0 |
| Bonaparte's Gull Chroicocephalus philadelphia | Laughing Gull Leucophaeus atricilla | 1 | 0 | 1 |
| Black Oystercatcher Haematopus bachmani | Franklin's Gull Leucophaeus pipixcan | 1 | 0 | 1 |
| Grey Plover Pluvialis squatarola | Franklin's Gull Leucophaeus pipixcan | 1 | 0 | 1 |
| Franklin's Gull Leucophaeus pipixcan | Common Gull Larus canus | 1 | 0 | 1 |
| Laughing Gull Leucophaeus atricilla | Short-billed Gull Larus brachyrhynchus | 1 | 0 | 1 |
| Short-billed Gull Larus brachyrhynchus | Herring Gull Larus argentatus | 1 | 1 | 0 |
| Western Gull Larus occidentalis | Kelp Gull Larus dominicanus | 1 | 0 | 1 |
| Herring Gull Larus argentatus | Sooty Shearwater Ardenna grisea | 1 | 1 | 0 |
| Ring-billed Gull Larus delawarensis | Great Black-backed Gull Larus marinus | 1 | 0 | 1 |
| California Gull Larus californicus | Glaucous-winged Gull Larus glaucescens | 1 | 1 | 0 |
| Bonaparte's Gull Chroicocephalus philadelphia | Glaucous-winged Gull Larus glaucescens | 1 | 0 | 1 |
| Glaucous Gull Larus hyperboreus | Glaucous-winged Gull Larus glaucescens | 1 | 0 | 1 |
| California Gull Larus californicus | Slaty-backed Gull Larus schistisagus | 1 | 0 | 1 |
| Glaucous-winged Gull Larus glaucescens | Slaty-backed Gull Larus schistisagus | 1 | 0 | 1 |
| Iceland Gull Larus glaucoides | Prothonotary Warbler Protonotaria citrea | 1 | 1 | 0 |
| Sooty Tern Onychoprion fuscatus | Least Tern Sternula antillarum | 1 | 1 | 0 |
| Sooty Tern Onychoprion fuscatus | Gull-billed Tern Gelochelidon nilotica | 1 | 1 | 0 |
| Caspian Tern Hydroprogne caspia | White-winged Black Tern Chlidonias leucopterus | 1 | 1 | 0 |
| White-winged Scoter Melanitta deglandi | Black Tern Chlidonias niger | 1 | 0 | 1 |
| White-winged Black Tern Chlidonias leucopterus | Forster's Tern Sterna forsteri | 1 | 1 | 0 |
| Iceland Gull Larus glaucoides | Common Tern Sterna hirundo | 1 | 0 | 1 |
| Arctic Tern Sterna paradisaea | Roseate Tern Sterna dougallii | 1 | 0 | 1 |
| Roseate Tern Sterna dougallii | Hermit Thrush Catharus guttatus | 1 | 1 | 0 |
| Roseate Tern Sterna dougallii | Sandwich Tern Thalasseus sandvicensis | 1 | 0 | 1 |
| Pacific Diver Gavia pacifica | White-billed Diver Gavia adamsii | 1 | 1 | 0 |
| Great Northern Diver Gavia immer | White-billed Diver Gavia adamsii | 1 | 1 | 0 |
| Iceland Gull Larus glaucoides | Laysan Albatross Phoebastria immutabilis | 1 | 0 | 1 |
| Laysan Albatross Phoebastria immutabilis | Northern Fulmar Fulmarus glacialis | 1 | 1 | 0 |
| Laysan Albatross Phoebastria immutabilis | Flesh-footed Shearwater Ardenna carneipes | 1 | 1 | 0 |
| Black-footed Albatross Phoebastria nigripes | Short-tailed Albatross Phoebastria albatrus | 1 | 1 | 0 |
| Black-footed Albatross Phoebastria nigripes | Wilson's Storm-Petrel Oceanites oceanicus | 1 | 1 | 0 |
| Black-footed Albatross Phoebastria nigripes | Little Egret Egretta garzetta | 1 | 1 | 0 |
| Goosander Mergus merganser | Short-tailed Albatross Phoebastria albatrus | 1 | 0 | 1 |
| Short-tailed Albatross Phoebastria albatrus | Black-browed Albatross Thalassarche melanophris | 1 | 1 | 0 |
| Short-tailed Albatross Phoebastria albatrus | Common Crossbill Loxia curvirostra | 1 | 1 | 0 |
| Sabine's Gull Xema sabini | Atlantic Yellow-nosed Albatross Thalassarche chlororhynchos | 1 | 0 | 1 |
| Arctic Skua Stercorarius parasiticus | Wilson's Storm-Petrel Oceanites oceanicus | 1 | 0 | 1 |
| Fork-tailed Storm-Petrel Hydrobates furcatus | Manx Shearwater Puffinus puffinus | 1 | 1 | 0 |
| Wilson's Storm-Petrel Oceanites oceanicus | Leach's Storm-Petrel Hydrobates leucorhous | 1 | 0 | 1 |
| Laughing Gull Leucophaeus atricilla | Northern Fulmar Fulmarus glacialis | 1 | 0 | 1 |
| Trindade Petrel Pterodroma arminjoniana | Loggerhead Shrike Lanius ludovicianus | 1 | 1 | 0 |
| Hawaiian Petrel Pterodroma sandwichensis | Cook's Petrel Pterodroma cookii | 1 | 0 | 1 |
| Cory's Shearwater Calonectris diomedea | Great Shearwater Ardenna gravis | 1 | 1 | 0 |
| Cory's Shearwater Calonectris diomedea | Clay-coloured Sparrow Spizella pallida | 1 | 1 | 0 |
| Pink-footed Shearwater Ardenna creatopus | Great Shearwater Ardenna gravis | 1 | 1 | 0 |
| Pink-footed Shearwater Ardenna creatopus | Buller's Shearwater Ardenna bulleri | 1 | 1 | 0 |
| Flesh-footed Shearwater Ardenna carneipes | Sooty Shearwater Ardenna grisea | 1 | 1 | 0 |
| Flesh-footed Shearwater Ardenna carneipes | Indigo Bunting Passerina cyanea | 1 | 1 | 0 |
| Great Black-backed Gull Larus marinus | Buller's Shearwater Ardenna bulleri | 1 | 0 | 1 |
| Buller's Shearwater Ardenna bulleri | Sooty Shearwater Ardenna grisea | 1 | 1 | 0 |
| Chuck-will's-widow Antrostomus carolinensis | Short-tailed Shearwater Ardenna tenuirostris | 1 | 0 | 1 |
| Sooty Shearwater Ardenna grisea | Short-tailed Shearwater Ardenna tenuirostris | 1 | 0 | 1 |
| Short-tailed Shearwater Ardenna tenuirostris | Manx Shearwater Puffinus puffinus | 1 | 0 | 1 |
| Brown Booby Sula leucogaster | Nazca Booby Sula granti | 1 | 1 | 0 |
| Masked Booby Sula dactylatra | Brandt's Cormorant Urile penicillatus | 1 | 1 | 0 |
| Red-throated Diver Gavia stellata | Pelagic Cormorant Urile pelagicus | 1 | 0 | 1 |
| Brandt's Cormorant Urile penicillatus | Double-crested Cormorant Nannopterum auritum | 1 | 0 | 1 |
| Double-crested Cormorant Nannopterum auritum | Neotropic Cormorant Nannopterum brasilianum | 1 | 1 | 0 |
| American Bittern Botaurus lentiginosus | Least Bittern Botaurus exilis | 1 | 1 | 0 |
| Least Bittern Botaurus exilis | Yellow-crowned Night Heron Nyctanassa violacea | 1 | 0 | 1 |
| American White Pelican Pelecanus erythrorhynchos | Little Blue Heron Egretta caerulea | 1 | 0 | 1 |
| Little Blue Heron Egretta caerulea | Snowy Egret Egretta thula | 1 | 1 | 0 |
| Elegant Tern Thalasseus elegans | Reddish Egret Egretta rufescens | 1 | 0 | 1 |
| Piping Plover Charadrius melodus | Snowy Egret Egretta thula | 1 | 0 | 1 |
| Green Heron Butorides virescens | Northern Mockingbird Mimus polyglottos | 1 | 1 | 0 |
| Glossy Ibis Plegadis falcinellus | Turkey Vulture Cathartes aura | 1 | 0 | 1 |
| Turkey Vulture Cathartes aura | Northern Hawk Owl Surnia ulula | 1 | 1 | 0 |
| Osprey Pandion haliaetus | Golden Eagle Aquila chrysaetos | 1 | 1 | 0 |
| Taiga Bean Goose Anser fabalis | Mississippi Kite Ictinia mississippiensis | 1 | 0 | 1 |
| Mississippi Kite Ictinia mississippiensis | Gyr Falcon Falco rusticolus | 1 | 1 | 0 |
| Sharp-shinned Hawk Accipiter striatus | American Kestrel Falco sparverius | 1 | 1 | 0 |
| Sharp-shinned Hawk Accipiter striatus | Cooper's Hawk Astur cooperii | 1 | 0 | 1 |
| American Goshawk Astur atricapillus | Broad-winged Hawk Buteo platypterus | 1 | 1 | 0 |
| Black-billed Cuckoo Coccyzus erythropthalmus | Steller's Sea-Eagle Haliaeetus pelagicus | 1 | 0 | 1 |
| Red-shouldered Hawk Buteo lineatus | Broad-winged Hawk Buteo platypterus | 1 | 0 | 1 |
| Swainson's Hawk Buteo swainsoni | Ferruginous Hawk Buteo regalis | 1 | 1 | 0 |
| Black-footed Albatross Phoebastria nigripes | Zone-tailed Hawk Buteo albonotatus | 1 | 0 | 1 |
| Broad-winged Hawk Buteo platypterus | Rough-legged Buzzard Buteo lagopus | 1 | 0 | 1 |
| Red-tailed Hawk Buteo jamaicensis | Ferruginous Hawk Buteo regalis | 1 | 0 | 1 |
| Rough-legged Buzzard Buteo lagopus | Ferruginous Hawk Buteo regalis | 1 | 0 | 1 |
| Western Screech-Owl Megascops kennicottii | Eastern Screech-Owl Megascops asio | 1 | 0 | 1 |
| Eastern Screech-Owl Megascops asio | Great Horned Owl Bubo virginianus | 1 | 1 | 0 |
| Tengmalm's Owl Aegolius funereus | Northern Saw-whet Owl Aegolius acadicus | 1 | 1 | 0 |
| Belted Kingfisher Megaceryle alcyon | Red-breasted Sapsucker Sphyrapicus ruber | 1 | 1 | 0 |
| Williamson's Sapsucker Sphyrapicus thyroideus | Yellow-bellied Sapsucker Sphyrapicus varius | 1 | 1 | 0 |
| Yellow-bellied Sapsucker Sphyrapicus varius | Pileated Woodpecker Dryocopus pileatus | 1 | 1 | 0 |
| Red-naped Sapsucker Sphyrapicus nuchalis | Hairy Woodpecker Leuconotopicus villosus | 1 | 1 | 0 |
| Red-breasted Sapsucker Sphyrapicus ruber | Black-backed Woodpecker Picoides arcticus | 1 | 1 | 0 |
| Lewis's Woodpecker Melanerpes lewis | Acorn Woodpecker Melanerpes formicivorus | 1 | 0 | 1 |
| Red-bellied Woodpecker Melanerpes carolinus | Black-backed Woodpecker Picoides arcticus | 1 | 1 | 0 |
| Red-bellied Woodpecker Melanerpes carolinus | Arctic Redpoll Acanthis hornemanni | 1 | 1 | 0 |
| Black-backed Woodpecker Picoides arcticus | Pileated Woodpecker Dryocopus pileatus | 1 | 1 | 0 |
| Black-backed Woodpecker Picoides arcticus | Hairy Woodpecker Leuconotopicus villosus | 1 | 0 | 1 |
| Downy Woodpecker Dryobates pubescens | Hairy Woodpecker Leuconotopicus villosus | 1 | 0 | 1 |
| Downy Woodpecker Dryobates pubescens | Pileated Woodpecker Dryocopus pileatus | 1 | 0 | 1 |
| Common Kestrel Falco tinnunculus | American Kestrel Falco sparverius | 1 | 1 | 0 |
| Sharp-shinned Hawk Accipiter striatus | Merlin Falco columbarius | 1 | 0 | 1 |
| Merlin Falco columbarius | Peregrine Falcon Falco peregrinus | 1 | 1 | 0 |
| Merlin Falco columbarius | Prairie Falcon Falco mexicanus | 1 | 1 | 0 |
| Peregrine Falcon Falco peregrinus | Prairie Falcon Falco mexicanus | 1 | 0 | 1 |
| Olive-sided Flycatcher Contopus cooperi | Yellow-bellied Flycatcher Empidonax flaviventris | 1 | 1 | 0 |
| Eastern Wood-Pewee Contopus virens | Acadian Flycatcher Empidonax virescens | 1 | 1 | 0 |
| Eastern Wood-Pewee Contopus virens | Willow Flycatcher Empidonax traillii | 1 | 1 | 0 |
| Eastern Wood-Pewee Contopus virens | Grey-cheeked Thrush Catharus minimus | 1 | 1 | 0 |
| Eastern Wood-Pewee Contopus virens | Yellow-bellied Flycatcher Empidonax flaviventris | 1 | 0 | 1 |
| Yellow-bellied Flycatcher Empidonax flaviventris | Acadian Flycatcher Empidonax virescens | 1 | 1 | 0 |
| Yellow-bellied Flycatcher Empidonax flaviventris | Least Flycatcher Empidonax minimus | 1 | 1 | 0 |
| Acadian Flycatcher Empidonax virescens | Nelson's Sparrow Ammospiza nelsoni | 1 | 1 | 0 |
| Yellow-bellied Flycatcher Empidonax flaviventris | Alder Flycatcher Empidonax alnorum | 1 | 0 | 1 |
| Yellow-bellied Flycatcher Empidonax flaviventris | Willow Flycatcher Empidonax traillii | 1 | 0 | 1 |
| Acadian Flycatcher Empidonax virescens | Willow Flycatcher Empidonax traillii | 1 | 0 | 1 |
| Willow Flycatcher Empidonax traillii | Brewer's Blackbird Euphagus cyanocephalus | 1 | 1 | 0 |
| Alder Flycatcher Empidonax alnorum | Least Flycatcher Empidonax minimus | 1 | 0 | 1 |
| Willow Flycatcher Empidonax traillii | Least Flycatcher Empidonax minimus | 1 | 0 | 1 |
| Hammond's Flycatcher Empidonax hammondii | Grey Flycatcher Empidonax wrightii | 1 | 1 | 0 |
| Hammond's Flycatcher Empidonax hammondii | Black-throated Blue Warbler Setophaga caerulescens | 1 | 1 | 0 |
| Grey Flycatcher Empidonax wrightii | Dusky Flycatcher Empidonax oberholseri | 1 | 1 | 0 |
| Least Flycatcher Empidonax minimus | Dusky Flycatcher Empidonax oberholseri | 1 | 0 | 1 |
| Dusky Flycatcher Empidonax oberholseri | Western Flycatcher Empidonax difficilis | 1 | 1 | 0 |
| Hammond's Flycatcher Empidonax hammondii | Western Flycatcher Empidonax difficilis | 1 | 0 | 1 |
| Sooty Grouse Dendragapus fuliginosus | Eastern Phoebe Sayornis phoebe | 1 | 0 | 1 |
| Northern Bobwhite Colinus virginianus | Say's Phoebe Sayornis saya | 1 | 0 | 1 |
| Eastern Phoebe Sayornis phoebe | Great Crested Flycatcher Myiarchus crinitus | 1 | 0 | 1 |
| Great Kiskadee Pitangus sulphuratus | Dickcissel Spiza americana | 1 | 1 | 0 |
| Variegated Flycatcher Empidonomus varius | Tropical Kingbird Tyrannus melancholicus | 1 | 0 | 1 |
| Alder Flycatcher Empidonax alnorum | Cassin's Kingbird Tyrannus vociferans | 1 | 0 | 1 |
| Thick-billed Kingbird Tyrannus crassirostris | Grey Kingbird Tyrannus dominicensis | 1 | 1 | 0 |
| Say's Phoebe Sayornis saya | Western Kingbird Tyrannus verticalis | 1 | 0 | 1 |
| Western Kingbird Tyrannus verticalis | Hermit Thrush Catharus guttatus | 1 | 1 | 0 |
| Western Kingbird Tyrannus verticalis | Grace's Warbler Setophaga graciae | 1 | 1 | 0 |
| Western Kingbird Tyrannus verticalis | Black-throated Grey Warbler Setophaga nigrescens | 1 | 1 | 0 |
| Vaux's Swift Chaetura vauxi | Eastern Kingbird Tyrannus tyrannus | 1 | 0 | 1 |
| Short-billed Dowitcher Limnodromus griseus | Eastern Kingbird Tyrannus tyrannus | 1 | 0 | 1 |
| Common Guillemot Uria aalge | Eastern Kingbird Tyrannus tyrannus | 1 | 0 | 1 |
| Western Wood-Pewee Contopus sordidulus | Eastern Kingbird Tyrannus tyrannus | 1 | 0 | 1 |
| Ross's Goose Anser rossii | Black-capped Vireo Vireo atricapilla | 1 | 0 | 1 |
| Scissor-tailed Flycatcher Tyrannus forficatus | Black-capped Vireo Vireo atricapilla | 1 | 0 | 1 |
| Black-capped Vireo Vireo atricapilla | White-eyed Vireo Vireo griseus | 1 | 1 | 0 |
| White-eyed Vireo Vireo griseus | Bell's Vireo Vireo bellii | 1 | 0 | 1 |
| Hutton's Vireo Vireo huttoni | Cassin's Vireo Vireo cassinii | 1 | 1 | 0 |
| Hutton's Vireo Vireo huttoni | Yellow-throated Vireo Vireo flavifrons | 1 | 0 | 1 |
| California Gull Larus californicus | Cassin's Vireo Vireo cassinii | 1 | 0 | 1 |
| Forster's Tern Sterna forsteri | Cassin's Vireo Vireo cassinii | 1 | 0 | 1 |
| Cassin's Vireo Vireo cassinii | Philadelphia Vireo Vireo philadelphicus | 1 | 1 | 0 |
| Cassin's Vireo Vireo cassinii | Warbling Vireo Vireo gilvus | 1 | 1 | 0 |
| Cassin's Vireo Vireo cassinii | Violet-green Swallow Tachycineta thalassina | 1 | 1 | 0 |
| Cassin's Vireo Vireo cassinii | Cerulean Warbler Setophaga cerulea | 1 | 1 | 0 |
| Lesser Scaup Aythya affinis | Blue-headed Vireo Vireo solitarius | 1 | 0 | 1 |
| Blue-headed Vireo Vireo solitarius | Black-and-white Warbler Mniotilta varia | 1 | 1 | 0 |
| Blue-headed Vireo Vireo solitarius | Western Tanager Piranga ludoviciana | 1 | 1 | 0 |
| Yellow-bellied Flycatcher Empidonax flaviventris | Philadelphia Vireo Vireo philadelphicus | 1 | 0 | 1 |
| Blue-headed Vireo Vireo solitarius | Philadelphia Vireo Vireo philadelphicus | 1 | 0 | 1 |
| Philadelphia Vireo Vireo philadelphicus | Warbling Vireo Vireo gilvus | 1 | 1 | 0 |
| Philadelphia Vireo Vireo philadelphicus | Yellow-green Vireo Vireo flavoviridis | 1 | 1 | 0 |
| Warbling Vireo Vireo gilvus | Yellow-green Vireo Vireo flavoviridis | 1 | 1 | 0 |
| Great Crested Flycatcher Myiarchus crinitus | Yellow-green Vireo Vireo flavoviridis | 1 | 0 | 1 |
| Brown Shrike Lanius cristatus | Loggerhead Shrike Lanius ludovicianus | 1 | 1 | 0 |
| Brown Shrike Lanius cristatus | Northern Shrike Lanius borealis | 1 | 0 | 1 |
| Northern Shrike Lanius borealis | Canada Jay Perisoreus canadensis | 1 | 1 | 0 |
| Greater White-fronted Goose Anser albifrons | Canada Jay Perisoreus canadensis | 1 | 0 | 1 |
| Canada Jay Perisoreus canadensis | Black-billed Magpie Pica hudsonia | 1 | 1 | 0 |
| Canada Jay Perisoreus canadensis | Common Raven Corvus corax | 1 | 1 | 0 |
| Steller's Jay Cyanocitta stelleri | California Scrub-Jay Aphelocoma californica | 1 | 1 | 0 |
| Black-billed Magpie Pica hudsonia | Northern Mockingbird Mimus polyglottos | 1 | 1 | 0 |
| Black Guillemot Cepphus grylle | Clark's Nutcracker Nucifraga columbiana | 1 | 0 | 1 |
| Say's Phoebe Sayornis saya | Clark's Nutcracker Nucifraga columbiana | 1 | 0 | 1 |
| Clark's Nutcracker Nucifraga columbiana | Bullock's Oriole Icterus bullockii | 1 | 1 | 0 |
| American Crow Corvus brachyrhynchos | Brown Thrasher Toxostoma rufum | 1 | 1 | 0 |
| American Crow Corvus brachyrhynchos | Fish Crow Corvus ossifragus | 1 | 0 | 1 |
| Black-capped Chickadee Poecile atricapillus | Boreal Chickadee Poecile hudsonicus | 1 | 1 | 0 |
| Black-capped Chickadee Poecile atricapillus | Eurasian Tree Sparrow Passer montanus | 1 | 1 | 0 |
| Alder Flycatcher Empidonax alnorum | Mountain Chickadee Poecile gambeli | 1 | 0 | 1 |
| Black-capped Chickadee Poecile atricapillus | Mountain Chickadee Poecile gambeli | 1 | 0 | 1 |
| Mountain Chickadee Poecile gambeli | Siberian Tit Poecile cinctus | 1 | 1 | 0 |
| Chestnut-backed Chickadee Poecile rufescens | Siberian Tit Poecile cinctus | 1 | 1 | 0 |
| Olive-sided Flycatcher Contopus cooperi | Shore Lark Eremophila alpestris | 1 | 0 | 1 |
| Sand Martin Riparia riparia | Northern Rough-winged Swallow Stelgidopteryx serripennis | 1 | 1 | 0 |
| Violet-green Swallow Tachycineta thalassina | Purple Martin Progne subis | 1 | 1 | 0 |
| Black Oystercatcher Haematopus bachmani | Purple Martin Progne subis | 1 | 0 | 1 |
| Cassin's Auklet Ptychoramphus aleuticus | Barn Swallow Hirundo rustica | 1 | 0 | 1 |
| Sulphur-bellied Flycatcher Myiodynastes luteiventris | Cliff Swallow Petrochelidon pyrrhonota | 1 | 0 | 1 |
| Cliff Swallow Petrochelidon pyrrhonota | Golden-crowned Kinglet Regulus satrapa | 1 | 1 | 0 |
| Cliff Swallow Petrochelidon pyrrhonota | Cave Swallow Petrochelidon fulva | 1 | 0 | 1 |
| Cliff Swallow Petrochelidon pyrrhonota | Yellow-browed Warbler Phylloscopus inornatus | 1 | 0 | 1 |
| Northern Shoveler Spatula clypeata | Arctic Warbler Phylloscopus borealis | 1 | 0 | 1 |
| Arctic Warbler Phylloscopus borealis | Cape May Warbler Setophaga tigrina | 1 | 1 | 0 |
| Arctic Warbler Phylloscopus borealis | Kamchatka Leaf Warbler Phylloscopus examinandus | 1 | 0 | 1 |
| Bushtit Psaltriparus minimus | Hooded Oriole Icterus cucullatus | 1 | 1 | 0 |
| Ruby-crowned Kinglet Corthylio calendula | Golden-crowned Kinglet Regulus satrapa | 1 | 1 | 0 |
| Golden-crowned Kinglet Regulus satrapa | White-breasted Nuthatch Sitta carolinensis | 1 | 1 | 0 |
| White-breasted Nuthatch Sitta carolinensis | Tennessee Warbler Leiothlypis peregrina | 1 | 1 | 0 |
| Pygmy Nuthatch Sitta pygmaea | Red-breasted Nuthatch Sitta canadensis | 1 | 0 | 1 |
| Blue-grey Gnatcatcher Polioptila caerulea | Canyon Wren Catherpes mexicanus | 1 | 1 | 0 |
| Brown Creeper Certhia americana | Rock Wren Salpinctes obsoletus | 1 | 0 | 1 |
| Rock Wren Salpinctes obsoletus | Canyon Wren Catherpes mexicanus | 1 | 1 | 0 |
| Willow Ptarmigan Lagopus lagopus | Canyon Wren Catherpes mexicanus | 1 | 0 | 1 |
| Sedge Wren Cistothorus stellaris | Carolina Wren Thryothorus ludovicianus | 1 | 1 | 0 |
| Sedge Wren Cistothorus stellaris | Northern Parula Setophaga americana | 1 | 1 | 0 |
| Alder Flycatcher Empidonax alnorum | Marsh Wren Cistothorus palustris | 1 | 0 | 1 |
| Marsh Wren Cistothorus palustris | Saltmarsh Sparrow Ammospiza caudacuta | 1 | 1 | 0 |
| Carolina Wren Thryothorus ludovicianus | Mourning Warbler Geothlypis philadelphia | 1 | 1 | 0 |
| Marsh Wren Cistothorus palustris | Bewick's Wren Thryomanes bewickii | 1 | 0 | 1 |
| Carolina Wren Thryothorus ludovicianus | Bewick's Wren Thryomanes bewickii | 1 | 0 | 1 |
| Crested Myna Acridotheres cristatellus | Brewer's Sparrow Spizella breweri | 1 | 1 | 0 |
| Crested Myna Acridotheres cristatellus | Blackpoll Warbler Setophaga striata | 1 | 1 | 0 |
| Grey Catbird Dumetella carolinensis | Mountain Bluebird Sialia currucoides | 1 | 1 | 0 |
| Curve-billed Thrasher Toxostoma curvirostre | Bendire's Thrasher Toxostoma bendirei | 1 | 1 | 0 |
| Brown Thrasher Toxostoma rufum | Bicknell's Thrush Catharus bicknelli | 1 | 1 | 0 |
| Snow Goose Anser caerulescens | Sage Thrasher Oreoscoptes montanus | 1 | 0 | 1 |
| Eurasian Wigeon Mareca penelope | Sage Thrasher Oreoscoptes montanus | 1 | 0 | 1 |
| Alder Flycatcher Empidonax alnorum | Eastern Bluebird Sialia sialis | 1 | 0 | 1 |
| Western Bluebird Sialia mexicana | Varied Thrush Ixoreus naevius | 1 | 1 | 0 |
| Eastern Bluebird Sialia sialis | Mountain Bluebird Sialia currucoides | 1 | 0 | 1 |
| Mountain Bluebird Sialia currucoides | American Redstart Setophaga ruticilla | 1 | 1 | 0 |
| American Moorhen Gallinula galeata | Townsend's Solitaire Myadestes townsendi | 1 | 0 | 1 |
| Long-tailed Skua Stercorarius longicaudus | Townsend's Solitaire Myadestes townsendi | 1 | 0 | 1 |
| Blue-headed Vireo Vireo solitarius | Townsend's Solitaire Myadestes townsendi | 1 | 0 | 1 |
| Varied Thrush Ixoreus naevius | Bicknell's Thrush Catharus bicknelli | 1 | 1 | 0 |
| Varied Thrush Ixoreus naevius | Swainson's Thrush Catharus ustulatus | 1 | 1 | 0 |
| Veery Catharus fuscescens | Swainson's Thrush Catharus ustulatus | 1 | 1 | 0 |
| Bicknell's Thrush Catharus bicknelli | Wood Thrush Hylocichla mustelina | 1 | 1 | 0 |
| Blue-grey Gnatcatcher Polioptila caerulea | Hermit Thrush Catharus guttatus | 1 | 0 | 1 |
| Swainson's Thrush Catharus ustulatus | Hermit Thrush Catharus guttatus | 1 | 0 | 1 |
| Mistle Thrush Turdus viscivorus | Song Thrush Turdus philomelos | 1 | 1 | 0 |
| Wood Thrush Hylocichla mustelina | Song Thrush Turdus philomelos | 1 | 0 | 1 |
| Song Thrush Turdus philomelos | Eurasian Blackbird Turdus merula | 1 | 0 | 1 |
| Upland Sandpiper Bartramia longicauda | Red-flanked Bluetail Tarsiger cyanurus | 1 | 0 | 1 |
| Siberian Stonechat Saxicola maurus | Northern Wheatear Oenanthe oenanthe | 1 | 1 | 0 |
| Cedar Waxwing Bombycilla cedrorum | Eurasian Tree Sparrow Passer montanus | 1 | 1 | 0 |
| Cedar Waxwing Bombycilla cedrorum | Siberian Accentor Prunella montanella | 1 | 0 | 1 |
| Phainopepla Phainopepla nitens | Siberian Accentor Prunella montanella | 1 | 0 | 1 |
| Eastern Yellow Wagtail Motacilla tschutschensis | Red-throated Pipit Anthus cervinus | 1 | 1 | 0 |
| Buff-bellied Pipit Anthus rubescens | Black-and-white Warbler Mniotilta varia | 1 | 1 | 0 |
| Brown Thrasher Toxostoma rufum | Sprague's Pipit Anthus spragueii | 1 | 0 | 1 |
| Buff-bellied Pipit Anthus rubescens | Sprague's Pipit Anthus spragueii | 1 | 0 | 1 |
| Sprague's Pipit Anthus spragueii | Lark Sparrow Chondestes grammacus | 1 | 1 | 0 |
| Sprague's Pipit Anthus spragueii | Baird's Sparrow Centronyx bairdii | 1 | 1 | 0 |
| Common Chaffinch Fringilla coelebs | Brambling Fringilla montifringilla | 1 | 0 | 1 |
| Brambling Fringilla montifringilla | Evening Grosbeak Hesperiphona vespertina | 1 | 1 | 0 |
| Pine Grosbeak Pinicola enucleator | Cassin's Finch Haemorhous cassinii | 1 | 1 | 0 |
| Bicknell's Thrush Catharus bicknelli | Grey-crowned Rosy-Finch Leucosticte tephrocotis | 1 | 0 | 1 |
| Philadelphia Vireo Vireo philadelphicus | Cassin's Finch Haemorhous cassinii | 1 | 0 | 1 |
| House Finch Haemorhous mexicanus | Cassin's Finch Haemorhous cassinii | 1 | 0 | 1 |
| Cassin's Finch Haemorhous cassinii | White-throated Sparrow Zonotrichia albicollis | 1 | 1 | 0 |
| Tree Swallow Tachycineta bicolor | Common Redpoll Acanthis flammea | 1 | 0 | 1 |
| Common Redpoll Acanthis flammea | Eurasian Siskin Spinus spinus | 1 | 1 | 0 |
| Cassin's Finch Haemorhous cassinii | Arctic Redpoll Acanthis hornemanni | 1 | 0 | 1 |
| Vaux's Swift Chaetura vauxi | Two-barred Crossbill Loxia leucoptera | 1 | 0 | 1 |
| Eurasian Siskin Spinus spinus | Pine Siskin Spinus pinus | 1 | 1 | 0 |
| Cassin's Finch Haemorhous cassinii | Lesser Goldfinch Spinus psaltria | 1 | 0 | 1 |
| Lesser Goldfinch Spinus psaltria | Baltimore Oriole Icterus galbula | 1 | 1 | 0 |
| Pine Siskin Spinus pinus | American Goldfinch Spinus tristis | 1 | 0 | 1 |
| Lesser Goldfinch Spinus psaltria | American Goldfinch Spinus tristis | 1 | 0 | 1 |
| American Goldfinch Spinus tristis | Lincoln's Sparrow Melospiza lincolnii | 1 | 1 | 0 |
| Gyr Falcon Falco rusticolus | Lapland Bunting Calcarius lapponicus | 1 | 0 | 1 |
| Lapland Bunting Calcarius lapponicus | Smith's Longspur Calcarius pictus | 1 | 1 | 0 |
| Chestnut-collared Longspur Calcarius ornatus | Smith's Longspur Calcarius pictus | 1 | 1 | 0 |
| Chestnut-collared Longspur Calcarius ornatus | Eastern Meadowlark Sturnella magna | 1 | 1 | 0 |
| Smith's Longspur Calcarius pictus | Thick-billed Longspur Rhynchophanes mccownii | 1 | 0 | 1 |
| Sandhill Crane Antigone canadensis | Snow Bunting Plectrophenax nivalis | 1 | 0 | 1 |
| Siberian Tit Poecile cinctus | Snow Bunting Plectrophenax nivalis | 1 | 0 | 1 |
| American Robin Turdus migratorius | Snow Bunting Plectrophenax nivalis | 1 | 0 | 1 |
| McKay's Bunting Plectrophenax hyperboreus | Pine Bunting Emberiza leucocephalos | 1 | 0 | 1 |
| Chestnut-collared Longspur Calcarius ornatus | Yellow-breasted Bunting Emberiza aureola | 1 | 0 | 1 |
| Arctic Warbler Phylloscopus borealis | Rustic Bunting Emberiza rustica | 1 | 0 | 1 |
| Rustic Bunting Emberiza rustica | Cassin's Sparrow Peucaea cassinii | 1 | 1 | 0 |
| Bachman's Sparrow Peucaea aestivalis | Clay-coloured Sparrow Spizella pallida | 1 | 1 | 0 |
| Grasshopper Sparrow Ammodramus savannarum | Field Sparrow Spizella pusilla | 1 | 1 | 0 |
| Grasshopper Sparrow Ammodramus savannarum | Chipping Sparrow Spizella passerina | 1 | 0 | 1 |
| Chipping Sparrow Spizella passerina | Field Sparrow Spizella pusilla | 1 | 1 | 0 |
| Field Sparrow Spizella pusilla | Brewer's Sparrow Spizella breweri | 1 | 1 | 0 |
| Brewer's Sparrow Spizella breweri | Lark Bunting Calamospiza melanocorys | 1 | 0 | 1 |
| Lark Bunting Calamospiza melanocorys | American Tree Sparrow Spizelloides arborea | 1 | 0 | 1 |
| Fox Sparrow Passerella iliaca | Dark-eyed Junco Junco hyemalis | 1 | 1 | 0 |
| Fox Sparrow Passerella iliaca | White-crowned Sparrow Zonotrichia leucophrys | 1 | 0 | 1 |
| White-crowned Sparrow Zonotrichia leucophrys | Harris's Sparrow Zonotrichia querula | 1 | 1 | 0 |
| White-crowned Sparrow Zonotrichia leucophrys | Golden-crowned Sparrow Zonotrichia atricapilla | 1 | 0 | 1 |
| Golden-crowned Sparrow Zonotrichia atricapilla | White-throated Sparrow Zonotrichia albicollis | 1 | 1 | 0 |
| Golden-crowned Sparrow Zonotrichia atricapilla | Vesper Sparrow Pooecetes gramineus | 1 | 1 | 0 |
| Golden-crowned Sparrow Zonotrichia atricapilla | Rose-breasted Grosbeak Pheucticus ludovicianus | 1 | 1 | 0 |
| White-throated Sparrow Zonotrichia albicollis | Nelson's Sparrow Ammospiza nelsoni | 1 | 1 | 0 |
| Sagebrush Sparrow Artemisiospiza nevadensis | LeConte's Sparrow Ammospiza leconteii | 1 | 1 | 0 |
| Harris's Sparrow Zonotrichia querula | Vesper Sparrow Pooecetes gramineus | 1 | 0 | 1 |
| Vesper Sparrow Pooecetes gramineus | LeConte's Sparrow Ammospiza leconteii | 1 | 0 | 1 |
| Seaside Sparrow Ammospiza maritima | Nelson's Sparrow Ammospiza nelsoni | 1 | 1 | 0 |
| Savannah Sparrow Passerculus sandwichensis | Song Sparrow Melospiza melodia | 1 | 1 | 0 |
| Baird's Sparrow Centronyx bairdii | Lincoln's Sparrow Melospiza lincolnii | 1 | 1 | 0 |
| American Goldfinch Spinus tristis | Song Sparrow Melospiza melodia | 1 | 0 | 1 |
| Song Sparrow Melospiza melodia | Lincoln's Sparrow Melospiza lincolnii | 1 | 1 | 0 |
| Song Sparrow Melospiza melodia | Yellow-rumped Warbler Setophaga coronata | 1 | 1 | 0 |
| Savannah Sparrow Passerculus sandwichensis | Lincoln's Sparrow Melospiza lincolnii | 1 | 0 | 1 |
| Henslow's Sparrow Centronyx henslowii | Lincoln's Sparrow Melospiza lincolnii | 1 | 0 | 1 |
| Lincoln's Sparrow Melospiza lincolnii | Ovenbird Seiurus aurocapilla | 1 | 1 | 0 |
| Lincoln's Sparrow Melospiza lincolnii | Painted Bunting Passerina ciris | 1 | 1 | 0 |
| Savannah Sparrow Passerculus sandwichensis | Swamp Sparrow Melospiza georgiana | 1 | 0 | 1 |
| Lincoln's Sparrow Melospiza lincolnii | Swamp Sparrow Melospiza georgiana | 1 | 0 | 1 |
| Black Guillemot Cepphus grylle | Spotted Towhee Pipilo maculatus | 1 | 0 | 1 |
| Baird's Sparrow Centronyx bairdii | Spotted Towhee Pipilo maculatus | 1 | 0 | 1 |
| Spotted Towhee Pipilo maculatus | Eastern Towhee Pipilo erythrophthalmus | 1 | 1 | 0 |
| Arctic Redpoll Acanthis hornemanni | Eastern Towhee Pipilo erythrophthalmus | 1 | 0 | 1 |
| Henslow's Sparrow Centronyx henslowii | Eastern Towhee Pipilo erythrophthalmus | 1 | 0 | 1 |
| Black Swift Cypseloides niger | Yellow-headed Blackbird Xanthocephalus xanthocephalus | 1 | 0 | 1 |
| Yellow-headed Blackbird Xanthocephalus xanthocephalus | Eastern Meadowlark Sturnella magna | 1 | 1 | 0 |
| Bobolink Dolichonyx oryzivorus | Eastern Meadowlark Sturnella magna | 1 | 1 | 0 |
| Western Meadowlark Sturnella neglecta | Baltimore Oriole Icterus galbula | 1 | 1 | 0 |
| Acadian Flycatcher Empidonax virescens | Eastern Meadowlark Sturnella magna | 1 | 0 | 1 |
| Western Meadowlark Sturnella neglecta | Eastern Meadowlark Sturnella magna | 1 | 0 | 1 |
| Orchard Oriole Icterus spurius | Hooded Oriole Icterus cucullatus | 1 | 1 | 0 |
| Grey-crowned Rosy-Finch Leucosticte tephrocotis | Bullock's Oriole Icterus bullockii | 1 | 0 | 1 |
| Eastern Meadowlark Sturnella magna | Baltimore Oriole Icterus galbula | 1 | 0 | 1 |
| Bullock's Oriole Icterus bullockii | Scott's Oriole Icterus parisorum | 1 | 0 | 1 |
| American Moorhen Gallinula galeata | Red-winged Blackbird Agelaius phoeniceus | 1 | 0 | 1 |
| Hudsonian Godwit Limosa haemastica | Red-winged Blackbird Agelaius phoeniceus | 1 | 0 | 1 |
| Bronzed Cowbird Molothrus aeneus | Rusty Blackbird Euphagus carolinus | 1 | 1 | 0 |
| Bronzed Cowbird Molothrus aeneus | Brewer's Blackbird Euphagus cyanocephalus | 1 | 1 | 0 |
| Brown-headed Cowbird Molothrus ater | Common Grackle Quiscalus quiscula | 1 | 1 | 0 |
| Rusty Blackbird Euphagus carolinus | Ovenbird Seiurus aurocapilla | 1 | 1 | 0 |
| Western Grebe Aechmophorus occidentalis | Common Grackle Quiscalus quiscula | 1 | 0 | 1 |
| Common Grackle Quiscalus quiscula | Louisiana Waterthrush Parkesia motacilla | 1 | 1 | 0 |
| Common Grackle Quiscalus quiscula | Northern Waterthrush Parkesia noveboracensis | 1 | 1 | 0 |
| Common Grackle Quiscalus quiscula | Great-tailed Grackle Quiscalus mexicanus | 1 | 0 | 1 |
| Northern Waterthrush Parkesia noveboracensis | Golden-winged Warbler Vermivora chrysoptera | 1 | 1 | 0 |
| White-tailed Ptarmigan Lagopus leucura | Golden-winged Warbler Vermivora chrysoptera | 1 | 0 | 1 |
| Blue-winged Warbler Vermivora cyanoptera | Yellow-rumped Warbler Setophaga coronata | 1 | 1 | 0 |
| Blue-winged Warbler Vermivora cyanoptera | Wilson's Warbler Cardellina pusilla | 1 | 1 | 0 |
| Prothonotary Warbler Protonotaria citrea | Swainson's Warbler Limnothlypis swainsonii | 1 | 0 | 1 |
| Swainson's Warbler Limnothlypis swainsonii | Common Yellowthroat Geothlypis trichas | 1 | 1 | 0 |
| Prothonotary Warbler Protonotaria citrea | Tennessee Warbler Leiothlypis peregrina | 1 | 0 | 1 |
| Vaux's Swift Chaetura vauxi | Orange-crowned Warbler Leiothlypis celata | 1 | 0 | 1 |
| Lucy's Warbler Leiothlypis luciae | Nashville Warbler Leiothlypis ruficapilla | 1 | 1 | 0 |
| Nashville Warbler Leiothlypis ruficapilla | MacGillivray's Warbler Geothlypis tolmiei | 1 | 1 | 0 |
| Nashville Warbler Leiothlypis ruficapilla | Mourning Warbler Geothlypis philadelphia | 1 | 1 | 0 |
| Nashville Warbler Leiothlypis ruficapilla | Magnolia Warbler Setophaga magnolia | 1 | 1 | 0 |
| Orange-crowned Warbler Leiothlypis celata | Connecticut Warbler Oporornis agilis | 1 | 0 | 1 |
| Connecticut Warbler Oporornis agilis | Prairie Warbler Setophaga discolor | 1 | 1 | 0 |
| Eastern Towhee Pipilo erythrophthalmus | MacGillivray's Warbler Geothlypis tolmiei | 1 | 0 | 1 |
| Mourning Warbler Geothlypis philadelphia | Common Yellowthroat Geothlypis trichas | 1 | 1 | 0 |
| Mourning Warbler Geothlypis philadelphia | Hooded Warbler Setophaga citrina | 1 | 1 | 0 |
| Mourning Warbler Geothlypis philadelphia | American Redstart Setophaga ruticilla | 1 | 1 | 0 |
| Mourning Warbler Geothlypis philadelphia | Grace's Warbler Setophaga graciae | 1 | 1 | 0 |
| Kentucky Warbler Geothlypis formosa | Yellow-throated Warbler Setophaga dominica | 1 | 1 | 0 |
| Kentucky Warbler Geothlypis formosa | Wilson's Warbler Cardellina pusilla | 1 | 1 | 0 |
| Willow Ptarmigan Lagopus lagopus | Hooded Warbler Setophaga citrina | 1 | 0 | 1 |
| Tennessee Warbler Leiothlypis peregrina | Hooded Warbler Setophaga citrina | 1 | 0 | 1 |
| Swainson's Warbler Limnothlypis swainsonii | Cape May Warbler Setophaga tigrina | 1 | 0 | 1 |
| Cape May Warbler Setophaga tigrina | Northern Parula Setophaga americana | 1 | 1 | 0 |
| Cape May Warbler Setophaga tigrina | Magnolia Warbler Setophaga magnolia | 1 | 1 | 0 |
| Eastern Bluebird Sialia sialis | Northern Parula Setophaga americana | 1 | 0 | 1 |
| Pine Siskin Spinus pinus | Northern Parula Setophaga americana | 1 | 0 | 1 |
| Smith's Longspur Calcarius pictus | Northern Parula Setophaga americana | 1 | 0 | 1 |
| Northern Parula Setophaga americana | Magnolia Warbler Setophaga magnolia | 1 | 1 | 0 |
| Connecticut Warbler Oporornis agilis | Magnolia Warbler Setophaga magnolia | 1 | 0 | 1 |
| Magnolia Warbler Setophaga magnolia | Blackburnian Warbler Setophaga fusca | 1 | 1 | 0 |
| Blue-winged Warbler Vermivora cyanoptera | Bay-breasted Warbler Setophaga castanea | 1 | 0 | 1 |
| Magnolia Warbler Setophaga magnolia | Bay-breasted Warbler Setophaga castanea | 1 | 0 | 1 |
| Blackburnian Warbler Setophaga fusca | Yellow Warbler Setophaga petechia | 1 | 1 | 0 |
| Blackburnian Warbler Setophaga fusca | Blackpoll Warbler Setophaga striata | 1 | 1 | 0 |
| Louisiana Waterthrush Parkesia motacilla | Chestnut-sided Warbler Setophaga pensylvanica | 1 | 0 | 1 |
| Black-and-white Warbler Mniotilta varia | Chestnut-sided Warbler Setophaga pensylvanica | 1 | 0 | 1 |
| Chestnut-sided Warbler Setophaga pensylvanica | Black-throated Blue Warbler Setophaga caerulescens | 1 | 1 | 0 |
| Chestnut-sided Warbler Setophaga pensylvanica | Palm Warbler Setophaga palmarum | 1 | 1 | 0 |
| Grey Plover Pluvialis squatarola | Blackpoll Warbler Setophaga striata | 1 | 0 | 1 |
| Savannah Sparrow Passerculus sandwichensis | Black-throated Blue Warbler Setophaga caerulescens | 1 | 0 | 1 |
| Northern Waterthrush Parkesia noveboracensis | Black-throated Blue Warbler Setophaga caerulescens | 1 | 0 | 1 |
| Short-billed Dowitcher Limnodromus griseus | Palm Warbler Setophaga palmarum | 1 | 0 | 1 |
| Golden-winged Warbler Vermivora chrysoptera | Palm Warbler Setophaga palmarum | 1 | 0 | 1 |
| Palm Warbler Setophaga palmarum | Pine Warbler Setophaga pinus | 1 | 1 | 0 |
| Palm Warbler Setophaga palmarum | Yellow-rumped Warbler Setophaga coronata | 1 | 1 | 0 |
| Pine Warbler Setophaga pinus | Townsend's Warbler Setophaga townsendi | 1 | 1 | 0 |
| American Woodcock Scolopax minor | Yellow-rumped Warbler Setophaga coronata | 1 | 0 | 1 |
| Golden-winged Warbler Vermivora chrysoptera | Yellow-rumped Warbler Setophaga coronata | 1 | 0 | 1 |
| Swainson's Warbler Limnothlypis swainsonii | Grace's Warbler Setophaga graciae | 1 | 0 | 1 |
| Cape May Warbler Setophaga tigrina | Black-throated Grey Warbler Setophaga nigrescens | 1 | 0 | 1 |
| American Goldfinch Spinus tristis | Townsend's Warbler Setophaga townsendi | 1 | 0 | 1 |
| Hooded Warbler Setophaga citrina | Townsend's Warbler Setophaga townsendi | 1 | 0 | 1 |
| Townsend's Warbler Setophaga townsendi | Black-throated Green Warbler Setophaga virens | 1 | 1 | 0 |
| Townsend's Warbler Setophaga townsendi | Wilson's Warbler Cardellina pusilla | 1 | 1 | 0 |
| American Redstart Setophaga ruticilla | Black-throated Green Warbler Setophaga virens | 1 | 0 | 1 |
| Tennessee Warbler Leiothlypis peregrina | Canada Warbler Cardellina canadensis | 1 | 0 | 1 |
| Wilson's Warbler Cardellina pusilla | Western Tanager Piranga ludoviciana | 1 | 1 | 0 |
| Painted Redstart Myioborus pictus | Summer Tanager Piranga rubra | 1 | 0 | 1 |
| Willow Flycatcher Empidonax traillii | Western Tanager Piranga ludoviciana | 1 | 0 | 1 |
| Northern Waterthrush Parkesia noveboracensis | Western Tanager Piranga ludoviciana | 1 | 0 | 1 |
| Canada Warbler Cardellina canadensis | Western Tanager Piranga ludoviciana | 1 | 0 | 1 |
| Western Tanager Piranga ludoviciana | Northern Cardinal Cardinalis cardinalis | 1 | 0 | 1 |
| Rose-breasted Grosbeak Pheucticus ludovicianus | Black-headed Grosbeak Pheucticus melanocephalus | 1 | 0 | 1 |
| Blue Grosbeak Passerina caerulea | Indigo Bunting Passerina cyanea | 1 | 1 | 0 |
| Upland Sandpiper Bartramia longicauda | Lazuli Bunting Passerina amoena | 1 | 0 | 1 |
| Boreal Chickadee Poecile hudsonicus | Lazuli Bunting Passerina amoena | 1 | 0 | 1 |
| Lazuli Bunting Passerina amoena | Indigo Bunting Passerina cyanea | 1 | 1 | 0 |
| Lazuli Bunting Passerina amoena | Painted Bunting Passerina ciris | 1 | 1 | 0 |
| Tropical Kingbird Tyrannus melancholicus | Varied Bunting Passerina versicolor | 1 | 0 | 1 |