Although variable, all yellow-rumped warblers possess a bright yellow rump, which is shared with only 2 other species. The yellow-rumped’s unique ability to digest the waxes in bayberries allows ...

Monotypic (smaller, darker resident birds in southern ... Shows less red on head than related red-naped and red-breasted, and the back is more extensively scalloped with yellow-buff.

Scientists say the yellow coloring on the bird is connected to lacking proteins, or enzymes. “It’s actually two enzymes. It ...

The yellow band at the base of their tail gives the species their name and makes the birds easy to identify. Kansas has two subspecies of these birds. Out west, the Audubon subspecies has a yellow ...