Rusty Blackbird

Overview

The Rusty Blackbird is a distinctive blackbird of northern wooded wetlands, notable for a dramatic seasonal change in appearance driven by feather wear rather than a true molt into a second plumage. It breeds in boreal Canada and Alaska and winters in wooded wetlands of the eastern and southern United States.

• Fresh fall feathers are heavily rust-edged, wearing to glossy black by spring
• Has experienced one of the steepest population declines of any North American landbird
• Breeds in boreal bogs, swamps, and wet woodland

Feather Identification

Rusty Blackbird feathers change appearance markedly through wear rather than an additional molt.

• Fresh fall feathers: Broadly edged with rusty-brown, giving a scaly, mottled appearance over black body plumage
• Worn spring/breeding feathers: Rusty edges worn away, revealing glossy black body plumage (male) or duller sooty gray plumage (female)
• Eye: Pale yellow iris in adults, contrasting with dark feathering around the eye
• Female feathers: Overall grayer and less glossy than males, with similar rusty edging when fresh
• The extensive rusty feather edging in fall and winter plumage is the best feature for identifying this species' shed feathers outside the breeding season

Plumage, Sex & Age Differences

In fresh fall and winter plumage, both sexes show extensive rusty edging over a black or gray base; this wears away by spring to reveal glossy black in males and dull sooty gray in females, without an additional molt. Juveniles resemble fresh fall adults. Adults undergo one complete molt in late summer, after which feather wear alone produces the breeding appearance.

Habitat & Range

Rusty Blackbirds breed in boreal wetlands, wooded swamps, and bog edges across Canada and Alaska. The species winters in wooded wetlands, swamps, and moist woodland of the eastern and southeastern United States, often near water. Populations have declined steeply over recent decades for reasons not fully understood.

Behavior, Voice & Field Notes

Rusty Blackbirds forage on the ground in shallow water, mud, and leaf litter, often in wooded wetlands, taking insects and other invertebrates. Their call is a sharp 'chack,' and their song is a creaky, squeaky note quite different from the whistled songs of some other blackbirds. They nest in shrubs or low trees near water within boreal wetland habitat.