Avian Osteology

Skull
47 mm


Sharp-shinned Hawk 36 - 48 mm	Merlin 40 - 50 mm	Western Screech-Owl 47 - 57 mm	Eastern Screech-Owl 47 - 56 mm


Burrowing Owl 43 - 50 mm	Boreal Owl 4 2 - 52 mm	Northern Saw-whet Owl 39 - 47 mm