134 Field Museum of Natural History — Zoology, Vol. IX. 



Size, large; eyes, not surrounded by radiated disk of feathers; 

 plumage, black or dark brown; hind toe, short; claws, not sharp; 

 head, bare in adult. Family CATHARTIDiE. Vultures. 



See page 141. 



Eyes, not surrounded by radiated disk of feathers, as in the Owls; 

 toes, armed with talons; head, not bare. 



Family FALCONID^. Hawks, Falcons, Eagles, etc. 



See page 143. 



ffU4L 



Eyes, surrounded by 

 radiated disk of feathers; 

 plumage, soft; bill, hooked; 

 toes, armed with talons. 



(a) Middle toe nail with comb-like edge. 



FAMILY ALUCONID^, Barn Owls. 

 See page 157. 



(6 ) Middle toe nail without comb-like edge. 



Family STRIGID.^. Horned Owls, Hoot Owls. 



Seepage 155. 



