Researchers recently discovered that traffic noise may be causing male Galápagos yellow warblers to behave more aggressively ...

The Galápagos yellow warblers on the more populous island of Santa Cruz also increased the duration of their song when ...

Unstreaked. The male is unlike any other finch in North America; the Wilson’s warbler is the only other bright yellow species with a black cap, but it does not have the finchlike bill or the ...

Monotypic (smaller, darker resident birds in southern Appalachians sometimes ... and the back is more extensively scalloped with yellow-buff. Adult male: forecrown, chin, and throat red, outlined ...

The yellow-billed cuckoo is sometimes called the "rain crow" because its song is often heard just before thunderstorms or summer showers. But this rare bird raises its voice less and less often in ...