Swainson's Warbler

I spent several hours looking for this species on this morning but folded my search when I was unable to find a representative. Departing the area in my rental vehicle, I heard a Kentucky Warbler singing from a forested hillside. I pulled over, hung my speaker on a roadside branch, and played a Kentucky call. However, as I did that, I heard a Swainson's call nearby. I stopped playing Kentucky, started playing Swainson's and -- BOOM -- this bird flew onto the perch to which my speaker was clipped. Given this species's stealthy nature, I couldn't believe my luck, especially when it decided to sing back to me! Not sure I'll ever such an amazing view to this cryptic bird.

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