Although named for a yellow rump…
This perky warbler also wears bright yellow on its crown, throat, and side patches.
A flock of these full- bodied warblers brightened the limbs of an Oregon Ash tree with flashes of yellow as they foraged for a late afternoon meal. This species is primarily a connoisseur of insects. Caterpillars, leaf beetles, bark beetles, and ants are some of the favorites.
A group of warblers has many collective nouns: bouquet, confusion, fall, and wrench of warblers.