Wilson's Warbler (Wilsonia canadensis)

Photo by BarrytheBirder

Olive above; yellow below, with yellow lores. Male has a distinctive black cap. The female may also have a black cap but it is sometimes absent.   Usually readily identified by its overall yellow / pale olive appearance and black cap.

It is fairly common, nests in dense, moist woodlands, bogs, streamside tangles and willow thickets.   

It breeds from Alaska, across southern Canada to Newfoundland, south to northern New England, Minnesota, and in the western mountains to California.   It is more common in the west than the east.   It winters in Mexico and Central America. 

Please comment if you wish.

BarrytheBirder