White-crowned Sparrow

The White-crowned Sparrow is a large, elegant sparrow known for its neat, bold head pattern: alternating black and white stripes running from the bill over the crown to the nape. The face and breast are clean gray, without the streaking found on many other sparrows, and the back and wings are brown with two white wing bars. The bill is typically pink, orange, or yellowish depending on subspecies.

Juveniles and first-winter birds have a similar pattern but with rufous-brown and buffy stripes instead of black and white, gradually acquiring the adult head pattern. The species is common across much of North America during migration and winter, and breeds in the far north and in mountainous or coastal areas of the West.

Key Field Marks

• Bold black-and-white crown stripes reaching down to the bill
• Plain gray face and unstreaked gray breast
• Pink, orange, or yellowish bill (varies by subspecies)
• Brownish back and wings with two white wing bars

Similar Species

• White-throated Sparrow: has a white throat patch and yellow lores, plus a darker, streakier overall look, unlike the White-crowned Sparrow's plain gray breast.
• Golden-crowned Sparrow (western North America): has a yellow crown patch bordered by black, without the crisp white-and-black striping of the White-crowned Sparrow.
• Immature White-crowned Sparrow: shows rufous-brown and buffy head stripes rather than black and white, which can cause confusion with other streak-headed sparrows until learned.

Habitat

White-crowned Sparrows use brushy and shrubby habitats, including chaparral, forest edges, tundra shrub zones, hedgerows, and weedy fields, as well as gardens during migration and winter.

Range

They breed across the Arctic and subarctic tundra of Canada and Alaska, as well as mountainous and coastal areas of the western United States, and winter across much of the southern and western U.S. and Mexico.

Migration

Most populations are medium- to long-distance migrants, and this species has been an important model for studying orientation and the physiology of migration in songbirds; some western populations are largely resident.

Behavior

White-crowned Sparrows often forage in flocks on the ground or in low shrubs, kicking through leaf litter, and they are frequently seen along woodland edges and brushy fields in loose association with other sparrow species.

Voice

The song is a mix of clear whistles followed by buzzy trilled notes, and it varies distinctly by region, forming local "dialects" that have been extensively studied by ornithologists.

Feeding

They primarily eat seeds, along with insects during the breeding season, foraging mostly on the ground in open, brushy areas.

Nesting & Breeding

Nests are built low in shrubs or on the ground, well hidden in vegetation, typically holding 3-5 eggs. This species has been a key subject in research on hormonal and neural control of migratory timing and song learning.