Swainson's Warbler

This is the same bird as in the adjacent three frames. I wasn't sure how to crop the image given that the perch runs vertically and the bird is mostly-horizonal, but I went with this format because it shows more of the lichen-covered stick. This wasn't a diliberate set-up; it was a fortuitous perch dangling in front of a clear background.

Red River Gorge, Powell County, Kentucky, 5/8/22
Canon 600mm f/4 IS II + 1.4x III on EOS R5
1/500 at f/5.6, ISO 1600