324 BIRDS OF THE ROCKIES 



373. Screech owl. MAGASCOPS ASIO. Rare resident; 

 the eastern analogue of the next. 



373e. Rocky Mountain screech owl. MAGASCOFS 

 ASIO MAXWELLS. Common resident; found from plains 

 and foothills to about 6,000 feet ; rare visitant at nearly 

 9,000 feet. 



373g. Aiken's screech owl. MEGASCOPS ASIO AIKENI. 

 Resident ; limited to from 5,000 to 9,000 feet. 



374. Flammulated screech owl. MEGASCOPS FLAMMEOLA. 

 Rare resident ; rarest owl in Colorado, if not in the United 

 States ; ten instances of breeding, all in Colorado ; twenty- 

 three records in all for the State. 



375a. Western horned owl. BUBO VIRGINIANUS PALLES- 

 CENS. Common resident ; breeds on the plains and in the 

 mountains. 



375b. Arctic horned owl. BUBO VIRGINIANUS ARCTI- 

 cus. Winter visitor; not uncommon; breeds in arctic 

 America. 



376. Snowy owl. NYCTEA NYCTEA. Rare winter vis- 

 itor ; occurs on the plains and in the lower foothills ; 

 range in summer, extreme northern portions of northern 

 hemisphere. 



378. Burrowing owl. SPEOTYTO CUNICULARIA HYPOG^A. 

 Resident ; abundant locally ; breeds on plains and up to 

 9,000 feet. 



379. Pygmy owl. GLAUCIDIUM GNOMA. Resident ; 

 rare ; favorite home in the mountains ; breeds as high as 

 10,000 feet. 



382. Carolina paroquet. CONURUS CAROLINENSIS. For- 

 merly resident ; few records ; general range, east and 

 south ; now almost exterminated. 



