I came across this drake mallard taking an afternoon nap at the Parkville Nature Sanctuary in Parkville, Missouri. He must have been quite tired because he remained undisturbed even though I forgot to switch to silent mode/electronic shutter. The area where he was resting is forested, providing soft filtered sunlight that was just enough to illuminate the scene without pushing the ISO too high.

Canon R5, EF 100-400mm f/4.5-5.6 IS II USM with 1.4x teleconverter at 490mm, 1/250s, f 8.0, ISO 2000.