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Rufous-crowned Sparrow

Aimophila ruficeps

In dry southwestern hills and canyons, where sparse brush covers the rocky slopes, pairs of Rufous-crowned Sparrows lurk in the thickets. Usually they are easy to overlook; but if they are alarmed, or if members of a pair become separated, they reveal their presence with a harsh nasal call, dear-dear-dear. Although they live in dense cover they are not especially shy if undisturbed, and a birder who sits quietly in their habitat may be able to observe them closely.

Conservation status	Still widespread and common, but surveys indicate overall declines in population in recent years.
Family	New World Sparrows
Habitat	Grassy or rocky slopes with sparse low bushes; open pine-oak woods. Habitat varies in different parts of range, but always in brushy areas. In Southwest, usually in rocky areas of foothills and lower canyons, in understory of pine-oak woods, or in chaparral or coastal scrub. On southern Great Plains, found in rocky outcrops with cover of dense grass and scattered bushes.

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Feeding Behavior

Forages mostly while walking or hopping on the ground, but also will feed up in weeds and low bushes. Tends to move slowly, foraging in a limited area. Usually forages in pairs or in family groups.

Eggs

3-4, sometimes 2-5. Pale bluish-white, unmarked. Incubation is probably by female, but details not well known. Young: Both parents feed the nestlings. Young probably leave the nest after about 8-9 days, before they are able to fly; young may remain with parents for up to several months.

Young

Both parents feed the nestlings. Young probably leave the nest after about 8-9 days, before they are able to fly; young may remain with parents for up to several months.

Diet

Mostly insects and seeds. Diet varies with season and locality, but tends to eat more insects in summer, more seeds in winter. Major items in diet may include caterpillars, beetle larvae and adults, grasshoppers, ants, and other insects and spiders. Also eats many seeds of grasses and weeds at all seasons, but especially in winter.

Nesting

Members of a pair may remain together all year on permanent home range. In spring and summer, male sings to defend nesting territory. Nest site is usually on the ground, typically well hidden at base of bush or grass clump, placed in a slight depression so that rim of nest is near ground level. Occasionally in low shrub, up to 1-3' above ground, especially in eastern part of range. Nest is an open cup made of small twigs, grass, weeds, plant fibers, often with some animal hair in lining.

Illustration © David Allen Sibley.
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Text © Kenn Kaufman, adapted from
Lives of North American Birds

Migration

Generally a permanent resident. Thought to retreat from some northern areas of range in winter, but may be simply overlooked at that season.

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Migration

Generally a permanent resident. Thought to retreat from some northern areas of range in winter, but may be simply overlooked at that season.

All Seasons - Common
All Seasons - Uncommon
Breeding - Common
Breeding - Uncommon
Winter - Common
Winter - Uncommon
Migration - Common
Migration - Uncommon

Songs and Calls

Song is a rapid, pleasing jumble of notes, recalling that of the House Wren, but with "sparrow quality." Distinctive call is a down-slurred dear dear dear and a thin, plaintive tseeee.

Audio © Lang Elliott, Bob McGuire, Kevin Colver, Martyn Stewart and others.
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How Climate Change Will Reshape the Range of the Rufous-crowned Sparrow

Audubon’s scientists have used 140 million bird observations and sophisticated climate models to project how climate change will affect this bird’s range in the future.

Zoom in to see how this species’s current range will shift, expand, and contract under increased global temperatures.

Climate threats facing the Rufous-crowned Sparrow

Choose a temperature scenario below to see which threats will affect this species as warming increases. The same climate change-driven threats that put birds at risk will affect other wildlife and people, too.