Adults are grey-olive on the upperparts with light underparts, washed with olive on the breast. They have two wing bars, and the primary remiges are long, giving the wingtip a slim and very pointed appearance. The upper part of the bill is dark, the lower part is yellowish.
Their breeding habitat is deciduous, mixed woods, or pine plantations in eastern North America. These birds migrate to Central America and in the Andes region of northern South America.
The songs are basically a mournful whistled pee-a'wee given in a series, which gave this bird its name, and a "we-aww" with a rising note at the end.