Buff-rumped Warbler

Description:

A quick pale flash across forest streams and trails often reveals the presence of the well-named Buff-rumped Warbler. It is dark olive-brown above, paler below, with a prominent pale supercilium and broad pale rump and base to the tail. It forages near or on the ground, constantly pumping its spread tail up and down while moving it from side to side as if in slow motion. Buff-rumped Warblers are common in damp lowlands and foothills, where pairs defend territories along waterways year-round. (Cornell)