A small bird of forests from the lowlands to low elevations in the mountains. Olive-green on the back with golden-olive wings and tail and a dark crown and eye-stripe. Whitish on the belly and throat with a pale yellow eyebrow and yellow under the base of the tail. Note the dark pinkish legs and the bicolored bill, dark above and orange below. Similar to Lemon-throated Leaf Warbler, but has a whitish throat. Differs from Arctic-type warblers in lacking any wingbars. Song consists of a lazy up-and-down sequence of high-pitched whistled notes.