Elfin-woods warbler Setophaga angelae

A medium-sized warbler of moist montane dwarf forests where it feeds actively in dense canopy foliage. It is most readily distinguished from Black-and-white Warbler by the absence of white streaking on its back and the lack of a white eyebrow. Easily separated from Blackpoll Warblers, which have a white, not black cheek. Song is a thin trill, higher pitched during first half and lower pitched during the second. Call note is a high, thin “Peet.”