This bird was one of the most approachable subjects I've ever photographed, and I suspect the thin green string on his right leg indicative of a formerly captive bird. He was totally relaxed as I approached, and he mostly ignore the whistles and clicks I gave in hopes of getting more direct eye contact. The sun had dipped behind a nearby ridge, but there was just enough light to close down to f/8 to ensure crisp focus across the entire bird. The rock perch was perfect!
Fang Hot Springs, Chiang Mai Province, Thailand, December 2019
Canon 600mm f/4 IS II on EOS 1DX Mark II
1/200 at f/8, ISO 2000, tripod