Palm Warblers are drab birds in the fall. A good key for their identification is their flamboyant tail wagging. Erika and I found Carleton College’s upper arboretum full of these migrants on 30 September. They seemed to be everywhere we looked (though we only reported ten individuals to eBird). We saw them in the trees, in the prairie, and even walking along the trail in front of us.
Despite its name, this species breeds further north than almost all of the warblers. It winters among the palms, however, residing then along the southeastern American coast and in the Caribbean. I have written about the interesting systematics of this bird.