Prothonotary Warbler

This is the same bird as in the frames at left. This species prefers the understory, so this fallen tree is an apropos perch.

Meeman-Shelby State Forest, Shelby County, Tennessee, 4/30/22
Canon 600mm f/4 IS II + 1.4x III on EOS R5
1/500 at f/5.6, ISO 1250