Brown-capped Rosy-Finch

The Brown-capped Rosy-Finch is a hardy, high-altitude specialist restricted almost entirely to the alpine zone of the southern Rocky Mountains, mainly in Colorado and adjacent southern Wyoming and northern New Mexico. It is a chunky, sparrow-sized finch with warm brown body plumage, a pale gray-brown crown patch (giving it the "brown-capped" name), and pink to rosy wash on the wings, rump, and belly that becomes more vivid in breeding males.

Of the three North American rosy-finch species, the Brown-capped is the only one lacking any gray on the head other than a faint cap, appearing overall the warmest brown-toned of the group. Females are duller and browner than males, with less extensive pink. This species tolerates some of the harshest breeding conditions of any North American songbird, nesting on cliff ledges and rocky crevices at elevations often above 3,600 meters (12,000 feet).

Key Field Marks

• Chunky finch with a short, conical, dark bill (yellow in winter)
• Warm chocolate-brown body overall
• Pale gray-brown crown patch bordered by darker brown
• Rosy-pink wash on wings, rump, and belly, brightest in adult males
• Black forehead in breeding males

Similar Species

• Gray-crowned Rosy-Finch: shows a broad, contrasting gray crown patch and gray on the nape/cheek, versus the Brown-capped's subtler, all-brown head.
• Black Rosy-Finch: overall blackish body plumage rather than warm brown, with a similar limited gray crown patch.
• Range and elevation are the best clues: Brown-capped Rosy-Finch is essentially confined to the Colorado Rockies and immediately adjacent high peaks, while the other two rosy-finches breed farther north and west.

Habitat

Brown-capped Rosy-Finches breed almost exclusively above treeline in alpine tundra, talus slopes, and permanent snowfields, nesting in rock crevices, cliff faces, and abandoned mine shafts. They are often seen foraging along the edges of retreating snow patches where wind-blown insects accumulate.

Range

This species has one of the most restricted breeding ranges of any North American bird, confined to the high peaks of central and southern Colorado, with smaller numbers in adjacent northern New Mexico and southern Wyoming.

Migration

Movements are largely altitudinal rather than long-distance migration. In winter, flocks descend to lower elevations, foothills, and mountain towns, sometimes visiting feeders, and often join mixed flocks with Gray-crowned and Black Rosy-Finches.

Behavior

Rosy-finches are highly social outside the breeding season, forming large mixed-species flocks that forage together on open ground, snowbanks, and rocky slopes. They walk and hop while foraging rather than hopping exclusively, gleaning seeds and insects from the surface.

Voice

The call is a soft, husky "chew" or "chirp," often given in flight by flocking birds; the song is a simple, high-pitched warbling series, seldom heard away from breeding cliffs.

Feeding

Diet shifts seasonally from mostly insects (particularly wind-deposited insects trapped on snow and ice) during the breeding season to seeds of alpine plants and weeds in winter.

Nesting

Nests are built in rock crevices, cliff ledges, or old buildings, constructed of grass, moss, and lichen lined with fine grass and feathers. Females typically lay 3-5 eggs and incubate alone, while both parents feed the young.