Juvenile: Brown and buff head; streaked underparts. The white-throated sparrow has a dark bill, prominent white throat, and yellow supraloral. Immature simi­lar to immature golden-crowned ...

The cheery and sociable house sparrow is more closely associated ... exhibits extensive geographic variation, with clinal variation: larger birds with shorter appendages in colder climes, darker ...

At that season it is frequently mistaken for the chipping sparrow, but the 2 rarely overlap in winter. The American tree sparrow often occurs in flocks of up to 50 birds. In habitat and behavior ...

Brownish back streaked with dark brown; breast, sides, and flanks grayish brown. Bill dusky above, pale below. Adult: yellow patch tops black crown; less distinct in winter. Immature: less ...

This sparrow (mono­­typic genus) feeds on bare or sandy ground. When flushed, it flies to a high perch. Few other sparrows are likely to fly high overhead during daylight. They call both when ...

This woodland sparrow of the East frequents feeders or feeds along woodland edges, darting for cover if disturbed. It may reemerge in response to pishing and can occur in large flocks (up to 150 ...

The song of the chingolo can be heard across South America. But young songbirds were no longer learning the tunes of their ...

This story appears in the January 2009 issue of National Geographic magazine. The final resting place of the last dusky seaside sparrow is a glass bottle in the Ornithology Collection at the ...

Of more than 120 named species, the smallest pterosaur measured no bigger than a sparrow; the largest reached a wingspan of nearly 40 feet (12 meters), wider than an F-16 fighter. Until recently ...