18C. 



KEY TO TlIK BIUDS OF EASTEKN NOKTH AMEUIOA. 



Group 5, Wing, over 15 inches long. 



Bill, Ijlack; gcueral plumage, tawny black and white; horu-like tufts of 



feathers over the eyes. 



Great Horned Owl. 



Bubo virgiiiiiiunx^ and races. 



See No. 309. 



Bill, blaek; general plumage, white, usually more or less marked witli slate 

 browu, or dark browu ; no horu-like tufts of feathers over the eyes. 



Snowy Owl. 



XijrU'a mjctea. 

 See No. 812. 



Bill, j'ellowish ; no horu-like tufts of feathers over eyes ; general plumage, gray 

 mixed with white aud dark brown. 



Great Gray Owl. 



Scoliaptux cinirea. 

 See No. 30-1. 



Gie it Cir ly Owl 





Great Homed Owl. 



