American Tree Sparrows are small, round-headed birds that often fluff out their feathers, making their plump bodies look even chubbier. Among sparrows, they have fairly small bills and long, thin tails.
About the size of a House Sparrow.sparrow-sized or smaller
- Both Sexes
- Length: 5.5 in (14 cm)
- Weight: 0.5-1.0 oz (13-28 g)
- Wingspan: 9.4 in (24 cm)