Tengmalm's Owl vs Northern Saw-whet Owl

Tengmalm's Owl and Northern Saw-whet Owl are small, similar owls with subtle differences. Tengmalm's Owl has a slightly larger head and more prominent facial disk, while Northern Saw-whet Owl is generally smaller with a more rounded head. Vocalizations differ, with Tengmalm's having a more consistent 'poo-poo-poo' call compared to the Saw-whet's 'toot-toot-toot'.

1. Head Shape: Tengmalm's Owl has a larger, more squared-off head compared to the rounded head of the Saw-whet Owl. 2. Facial Disk: Look for a more pronounced facial disk in Tengmalm's Owl. 3. Call: Listen for the consistent 'poo-poo-poo' of Tengmalm's Owl versus the 'toot-toot-toot' of the Saw-whet Owl. 4. Habitat: Note the habitat; Tengmalm's prefers dense coniferous forests, while Saw-whet can be in mixed woodlands. 5. Size: Slightly larger size and more robust appearance can indicate Tengmalm's Owl.

Tengmalm's Owl is slightly larger than the Northern Saw-whet Owl, with a more robust head.

Both species have mottled brown and white plumage, but Tengmalm's Owl has a more pronounced facial disk and slightly darker overall appearance.

Both species are nocturnal and hunt from low perches, but Tengmalm's Owl is more likely to be found in dense coniferous forests.

Tengmalm's Owl prefers dense, mature coniferous forests, while Northern Saw-whet Owl is found in a wider range of woodland habitats, including mixed and deciduous forests.

Tengmalm's Owl has a consistent 'poo-poo-poo' call, while Northern Saw-whet Owl produces a 'toot-toot-toot' series, which can vary more in tempo.