CHECK-LIST OF COLORADO BIRDS tV23 



not quite sure that it breeds in the State ; has been taken 

 in summer at an altitude of 1 1 ,000 feet. 



36o. American sparrow hawk. Falco sparverius. 

 Abundant resident ; the most common hawk from the 

 plains to 11 ,000 feet ; some winter in State ; breeds 

 throughout its range. 



360a. Desert sparrow hawk. Falco sparverius deser- 

 TicoLUS. Resident, though rare ; taken in Middle and 

 South Parks. 



36i. American osprey. Pandion haliaetus caroli- 

 NENsis. Summer resident ; not uncommon locally ; breeds 

 as high as .0,000 feet ; has been taken in fall at an altitude 

 of 10,500 feet. 



365. American barn owl. Strix pratincola. Resi- 

 dent ; quite rare ; a southern species rarely coming so far 

 north as Colorado. 



366. American long-eared owl. Asio wilsonianus. Com- 

 mon resident ; winters from plains to 10,000 feet; breeds 

 from plains to 11,000 feet ; eggs laid early in April. 



367. Short-eared owl. Asio accipitrinus. Resident, 

 but not common ; highest record 9,500 feet. 



368. Barred owl. Syrnilm nebulosum. Resident ; 

 few records ; one breeding pair found in the northeastern 

 part of the State. 



369. Spotted ow^l. SvRNiuM occidentale. Resident ; 

 not common ; a little doubt as to its identity ; but Mr. 

 Aiken vouches for its presence in the State. 



371. Richardson's ow^l. Nvctala tengmalmi richard- 

 soNi. Rare winter visitor ; a northern species. 



372. Saw-whet owl. Nvctala acadica. Resident ; not 

 uncommon ; occurs throughout the State below 8,000 feet. 



