Lesser Yellowlegs vs Greater Yellowlegs

In short

Lesser Yellowlegs and Greater Yellowlegs are similar shorebirds best distinguished by size, bill length, and vocalizations. The Greater Yellowlegs is larger with a longer bill, while the Lesser Yellowlegs is smaller and more delicate. Their calls also differ, with the Greater Yellowlegs having a louder, more piercing call.

Identification tips

1. Size and Bill Length: The Greater Yellowlegs is larger with a longer, slightly upturned bill. 2. Vocalizations: Listen for the Greater Yellowlegs' louder, piercing call compared to the softer call of the Lesser Yellowlegs. 3. Behavior: Note the Greater Yellowlegs' more solitary nature versus the Lesser Yellowlegs' tendency to form small flocks.

Size

The Greater Yellowlegs is noticeably larger than the Lesser Yellowlegs, with a longer neck and legs. The bill of the Greater Yellowlegs is also longer and slightly upturned.

Plumage

Both species have bright yellow legs and similar plumage patterns, making color a less reliable distinguishing feature. However, the Greater Yellowlegs may appear slightly darker overall.

Behaviour

Greater Yellowlegs are more solitary and less likely to be seen in large flocks compared to Lesser Yellowlegs, which often travel in small groups.

Habitat

Both species inhabit wetlands, but the Greater Yellowlegs is more likely to be found in swampy muskeg habitats during breeding, while Lesser Yellowlegs favor open woodlands and meadows.

Voice

The Greater Yellowlegs has a louder, more piercing call often described as a 'telltale' or 'tattler,' while the Lesser Yellowlegs has a softer, more musical call.