Welcome back to the warblers!
From page 460-461 in The Warbler Guide:
The worm-eating warbler can be identified by its mustard-colored head with four bold black stripes. It has long, pale, and slightly curved bill, and plain, dusky-olive back and wings. The male and female worm-eating warblers look the same in all seasons. The worm-eating warbler is deliberate and acrobatic in its explorations of the understory. It specializes in picking insects from hanging dead leaves.
Warblers are among the most challenging birds to identify. They exhibit an array of seasonal plumages and have distinctive yet oft-confused calls and songs. The Warbler Guide enables you to quickly identify any of the 56 species of warblers in the United States and Canada. This groundbreaking guide features more than 1,000 stunning color photos, extensive species accounts with multiple viewing angles, and an entirely new system of vocalization analysis that helps you distinguish songs and calls.
The Warbler Guide revolutionizes birdwatching, making warbler identification easier than ever before. For more information, please see the author videos on the Princeton University Press website.