This Wilson's warbler, a small yellow-colored songbird, has a special field mark that makes it easy to identify—a black cap ...

Bird sounds courtesy of the Cornell Lab of Ornithology A common migrant, the black-throated green warbler has a deep black throat, yellow head, olive-green back and two white wing bars.

This rather yellowish green warbler, named for its least conspicuous character, forages lower than many species. It lays 4 to 5 eggs (March–May in west, June in east) in its nest on or near the ...