Lark Bunting vs American Tree Sparrow

In short

The Lark Bunting and American Tree Sparrow can be distinguished by their plumage and behavior. Lark Buntings are known for their striking male alternate plumage and nomadic winter flocks, while American Tree Sparrows have a distinctive bicolored bill and are more solitary in winter.

Identification tips

1. Look for the bold black and white plumage of male Lark Buntings in breeding season. 2. Note the rusty cap and bicolored bill of the American Tree Sparrow. 3. Observe flock behavior: large flocks suggest Lark Buntings, while solitary or small groups suggest American Tree Sparrows. 4. Consider habitat: open grasslands for Lark Buntings, shrubby areas for American Tree Sparrows.

Size

Both species are small sparrows, but the Lark Bunting is slightly larger and more robust compared to the American Tree Sparrow.

Plumage

Male Lark Buntings in breeding season have a bold black and white plumage, while females and non-breeding males are more subdued brown. American Tree Sparrows have a rusty cap, gray face with a rusty eye line, and a bicolored bill, which is consistent across seasons.

Behaviour

Lark Buntings are highly nomadic in winter, forming large flocks, whereas American Tree Sparrows are more solitary or found in small groups during the same period.

Habitat

Lark Buntings prefer open grasslands and can adapt to human-altered habitats, while American Tree Sparrows are often found in shrubby or brushy areas, especially during winter.

Voice

Lark Buntings have two distinct flight songs, while American Tree Sparrows have a musical, sweet song that is different from the Lark Bunting's vocalizations.