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: Breeds in Northern Asia, specifically in the Upper Ob and Altai in Siberia to Anadyr region and Sakhalin Island, to eastern Himalayas and China. Strongly migratory and winters in Northern India, Burma and the foothills of Nepal. Preferred habitats include mountain thickets and forests, bogs and wet meadows.

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.