A medium-sized warbler with a relatively wide, flat bill and fairly long, expressive tail. In flight it has a deep chest, slim belly, and long, somewhat club-shaped tail.
About the size of a Black-capped Chickadee or Yellow Warbler.sparrow-sized or smaller
- Both Sexes
- Length: 4.3-5.1 in (11-13 cm)
- Weight: 0.2-0.3 oz (6-9 g)
- Wingspan: 6.3-7.5 in (16-19 cm)