Definitions by birdnerd231

butterbutt 

The Butterbutt, or, more properly, the Yellow-rumped Warbler (Dendroica coronata) is one of the most common warblers in North America. In summers, males have streaked backs of black on slate blue, white wing patches, a streaked breast, and conspicuous yellow patches on the crown, flank, and rump.

I saw a butterbutt flitting around in the tree outside my window

butterbutt by birdnerd231 March 5, 2010