Yellow Warblers migrate almost as soon as they are finished breeding. They often leave in early July and are gone by August. The Yellow Warbler winters from Baja California to Central Peru. They return to the Gulf coast in mid April. We see them here in Canada in May.
Although the Yellow Warbler is one of our more familiar warblers, their numbers have declined in some areas. The loss of river habitat in the southwest as well as parasitism by cowbirds has caused some decline.
