Avian Osteology

Skull
83 mm


Osprey 72 - 85 mm	Red-tailed Hawk 75 - 87 mm	Ferruginous Hawk 83 - 96 mm	Rough-legged Hawk 71 - 86 mm


Gyrfalcon 72 - 83 mm	Great Horned Owl 80 - 92 mm	Snowy Owl 82 - 96 mm	Great Gray Owl 76 - 90 mm