Tree Swallows having a heated discussion, D500 and Sigma 500mm f4 sport, hand held, at 500mm f/4.5, ISO 180, shutter speed 1600. PP using DXO PhotoLab Elite and Affinity photo. : r/Nikon
Sigma 500mm F4 DG OS HSM Sports Lens (Telephoto) for Canon | 500mm Lens - YouTube