Glaucous-winged Gull in flight, Edmonds, WA. 1/18/2018 5:04pm.
Canon 5DSR, Canon EF 70-200mm f/2.8L IS II USM, 200mm focal length, f/2.8, ISO 400, 1/1250 sec.
The 5DSR has a 50.6 MP sensor, so you can crop the hell out of an image and still get lots of detail.