Male Galápagos yellow warblers appear to be shifting their behavior and adjusting their calls in response to the din of ...

The palm warbler shows yellow undertail coverts. Common breeder in coniferous woodlands; very common short- to medium-­distance migrant to central United States south to Caribbean and central Panama.

Underparts very yellow with white undertail coverts ... 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 ...