The Four Keys to ID
- Size & Shape
A small songbird, compact with a round head, plump body and shortish tail. The bill is fine, straight, and pointed.
Relative Size
Smaller than a White-breasted Nuthatch, larger than a Blue-gray Gnatcatcher.
sparrow-sized or smallerMeasurements
- Both Sexes
- Length: 4.3-5.1 in (11-13 cm)
- Weight: 0.2-0.5 oz (6.7-13.9 g)
- Wingspan: 6.7-7.9 in (17-20 cm)
- Color Pattern
- Behavior
- Habitat
Regional Differences
Nashville Warbler has two populations: a form that occurs in the mountains of the West Coast and is often called “Calaveras Warbler”; and a more widespread form that breeds across northeastern and north-central North America. The "Calaveras" form is brighter across the underparts and on the back than the eastern form, with a longer tail that it often bobs while foraging.