Size: L: 15 cm. Wt: 20 g. Males and females are similar. This species is seasonally dimorphic.
Breeding Adult/Juvenile: back and wings dark brown, with pale, slightly downcurved stripe on each side of back, and buffy scalloping, may have some rufous; head, nape, throat, and breast brown, with faint or distinct dark streaking; pale brown eyebrow, and dark eye stripe; belly, flanks, and undertail coverts white; bill short, thin, black; legs yellowish-brown
Winter Adult: back and wings brown, with faint scalloped appearance; head and nape brown, with streaking; whitish eyebrow; throat white; breast with distinct brown band; belly, flanks, and undertail coverts white; bill and legs as in breeding adult/juvenile