Avian Osteology

Skull
55 mm


Northern Harrier 55-69 mm	Cooper's Hawk 48-63 mm	Western Screech-Owl 47 - 57 mm	Eastern Screech-Owl 47 - 56 mm


Northern Hawk Owl 51-61 mm	Long-eared Owl 51 - 59 mm	Short-eared Owl 51-61 mm