The Yellow Warbler is a small songbird of the warbler family. Both sexes are yellow in color, with light olive upperparts. Males sport rusty chest stripes during breeding season. The males of some subspecies also develop rusty caps during breeding as well.
Yellow Warblers breed across much of the United States. They winter from Central America down into northern South American countries. The build their cup nests in trees and prefer open woodland habitat for breeding.
Yellow Warblers are particularly susceptible to nest parasitism by Brown-headed Cowbirds; if the foreign egg is discovered and recognized, the Yellow Warbler will build a new nest on top of the old (abandoned) nest and breed again. Nests up to six tiers high have been recorded.
How can you remember the song of the Yellow Warbler? Some birdwatchers say it sounds like they are singing Sweet, sweet, I'm so sweet!