General

Dusky Warbler: Small, dark warbler with gray-brown upperparts, gray-streaked underparts, distinct white eyebrow, and faint eye-ring. Tail is slightly round-tipped. Constantly flicks wings. Sexes are similar. Rare visitor to Alaska.

Range and Habitat

Dusky Warbler: Native of Asia; casual on islands off western Alaska, and in fall off south coastal Alaska and in California. Preferred habitats include mountain thickets and forests.

Breeding and Nesting

Dusky Warbler: Four to six white eggs are laid in a sphere-shaped ground nest built by the female. Incubation is 11 to 13 days and carried out by the female.

Foraging and Feeding

Dusky Warbler: Diet includes insects and other small invertebrates picked from tree branches and leaves. Often forages for food on the ground.

Vocalization

Dusky Warbler: Utters a hard, sharp "tschick", sometimes doubled or in quick succession when alarmed. Whistling ends with a pleasant trill.

Similar Species

Dusky Warbler: Arctic Warbler is larger, has olive-green upperparts, pale wing-bars, squared tail, pale legs, and yellow wash on breast and underparts.