Avian Osteology

Skull
80 mm


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


Barn Owl 64 - 81 mm	Great Horned Owl 80 - 92 mm	Barred Owl 70 - 82 mm	Great Gray Owl 76 - 90 mm