Avian Osteology

Skull
72 mm


	Osprey 72 - 85 mm	Northern Goshawk 66 - 76 mm	Swainson's Hawk 67 - 79 mm	Rough-legged Hawk 71 - 86 mm


	Gyrfalcon 72 - 83 mm	Peregrine Falcon 62 - 74 mm	Prairie Falcon 61 - 72 mm


	Barn Owl 64 - 81 mm	Spotted Owl 70 - 78 mm	Barred Owl 70 - 82 mm