Palm warblers constantly pump their tails in a down-then-up motion, more so than any other warbler. They also walk and run on the ground more than most warblers. A key field mark is the bright yellow undertail coverts which contrast with whiter underparts. Palm Warblers are hardy warblers, migrating early in the spring and late in the fall.

Birds presumably Palm warblers are regular fall transients on the outer Oregon coast and irregularly remain through the winter and spring. They are occasional spring and fall transients in the Willamette Valley and have been found wintering there.

Hear the song of the Palm warbler

Photo by Laura Gooch, Flickr