Olive-green colored upperparts. Yellow supercilium and underparts. Male has a round, black crown cap. Thin, pinkish, pointed bill. Pinkish legs. No wingbars or other distinctive marks. Female lacks black cap. 4.5 to 5 inches in length.

Woodland edges and thickets. Often found near water and willows.

Nesting

4-5 white eggs with small reddish-brown spots and a 12-13 day incubation period. Nestlings fledge in 8-11 days. The nest is a bulky open cup made from leaves, moss, and rootlets. The nest is lined with hair and other soft plant materials. It is built on the ground and concealed in a clump of weeds or sedge.