324 BIRDS OF THE ROCKIES 



373. Screech owl. Magascops asio. Rare resident; 

 the eastern analogue of the next. 



373e. Rocky Mountain screech owl. Magascops 

 ASIO MAXWELLi.E. Connnon resident ; found from plains 

 and foothills to about 6.000 feet ; rare visitant at nearly 

 9,000 feet. 



373g. Aiken's screech owl. Mega.scops 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^ea. 

 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. 



