Blue-winged Warbler — Vermivora cyanoptera
The male has a yellow crown and bright yellow underparts. It has two white wing bars on blue gray wings. The female is similar, but has less distinctive coloring. This species prefers forest edges and open areas with dense undergrowth. This warbler breeds in shrubby or weedy areas, such as power lines, in the northeastern United States. It occasionally interbreeds with the Golden-winged warbler resulting in two hybrids: Brewster's Warbler and the Lawrence's Warbler.