JAN., 1909. BIRDS OP ILLINOIS AND WISCONSIN CORY. 



GROUP 5. Wing, over 15 inches long. 



Bill, black; general plumage, tawny, black and white; horn-like 

 tufts of feathers over the eyes. Bubo virginianus, and races. 



Great Horned Owl. 

 See Nos. 181, i8ia. 



Bill, black; general plumage, white, usually more or less marked 

 with slate brown, or dark brown; no horn-like tufts of feathers over 

 the eyes. Nyctea nyctea. 



Snowy Owl. 

 See No. 182. 



Bill, yellowish; no horn- like tufts of feathers over eyes; general 

 plumage, gray mixed with white and dark brown. 



Scotiaptex nebulosa. 

 Great Gray Owl. 

 See No. 177. 





Great Horned Owl. 



