Black Rosy-Finch

The Black Rosy-Finch has the most restricted breeding range of the three North American rosy-finch species, nesting only among the highest peaks of a narrow band of the central Rocky Mountains, an extreme alpine environment even by rosy-finch standards.

Adults appear notably darker than their relatives, with a blackish-brown body overall, offset by a rosy-pink wash on the wings, rump, and belly, a black forehead, and a pale gray patch on the crown and nape. This dark base coloring, darker than either the Gray-crowned or Brown-capped Rosy-Finch, is the species' most distinctive feature.

Because its breeding range is confined to a small number of high mountain ranges, and because alpine habitat is expected to shrink as the climate warms, the Black Rosy-Finch is considered one of the more climate-vulnerable songbirds in North America despite its stable current global population status.

Key Field Marks

• Blackish-brown body overall, the darkest of the three rosy-finch species
• Rosy-pink wash on the wings, rump, and belly
• Black forehead and a contrasting pale gray patch on the crown and nape
• Found only in high alpine terrain of the central Rockies

Similar Species

• Gray-crowned Rosy-Finch: paler, warmer pinkish-brown body overall rather than blackish-brown
• Brown-capped Rosy-Finch: lacks the contrasting gray crown patch, appearing more uniformly brown-headed, and is generally found farther south in Colorado and northern New Mexico

Overall darkness of the body plumage is the single best mark separating this species from its two close relatives where ranges may overlap in winter flocks.

The Black Rosy-Finch breeds only in high alpine tundra, rocky cliffs, and talus slopes above treeline in a limited portion of the central Rocky Mountains, including parts of Wyoming, Idaho, Montana, Utah, and Nevada, typically near permanent or long-lasting snowfields.

In winter, birds move to somewhat lower elevations nearby, foraging in flocks on open ground and sometimes visiting feeders in mountain towns, occasionally alongside Gray-crowned and Brown-capped Rosy-Finches where their winter ranges overlap. Because the species nests only in a narrow band of the highest peaks, its total range is smaller than that of either of its rosy-finch relatives.

Behavior

Black Rosy-Finches forage on the ground across rocky tundra and snowfields, often in flocks, walking and picking at seeds and insects rather than actively hawking prey in flight.

Voice

Calls are simple, high-pitched chirping notes, similar to those of other rosy-finches, often given by flocks in flight over open alpine terrain.

Feeding

Diet includes alpine plant seeds and insects, with insects that have been blown onto snowfields and chilled into torpor forming an especially important food source in the sparse high-elevation environment.

Nesting and Breeding

Nests are built in protected rock crevices or cliff ledges at very high elevation, lined with grass, moss, and feathers for insulation against harsh alpine conditions. Clutches typically contain 3-5 white eggs.