349. =Golden eagle.= AQUILA CHRYSAETOS. Resident; common in favorable localities; breeds from foothills to 12,500 feet; in winter on plains and also in mountains, often at 11,000 feet. 352. =Bald eagle.= HALLÆETUS LEUCOCEPHALUS. Fairly common resident; mostly in mountains in summer; on plains in winter. 355. =Prairie falcon.= FALCO MEXICANUS. Not uncommon resident; breeds from plains to 10,000 feet; quite numerous in more open portions of western Colorado. 356. =Duck hawk.= FALCO PEREGRINUS ANATUM. Resident; not uncommon locally; breeds up to 10,000 feet. 357. =Pigeon hawk.= FALCO COLUMBARIUS. Summer resident; not common; usual breeding grounds 8,000 to 9,000 feet; some breed on the plains. 358. =Richardson's merlin.= FALCO RICHARDSONII. Rare summer resident; not uncommon in migration; naturalists not quite sure that it breeds in the State; has been taken in summer at an altitude of 11,000 feet. 360. =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 DESERTICOLUS. Resident, though rare; taken in Middle and South Parks. 364. =American osprey.= PANDION HALIAËTUS CAROLINENSIS. Summer resident; not uncommon locally; breeds as high as 9,000 feet; has been taken in fall at an altitude of 10,500 feet. 365. =American barn owl.= STRIX PRATINCOLA. Resident; quite rare; a southern species rarely coming so far north as Colorado. 366. =American long-eared owl.= ASIO WILSONIANUS. Common 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.= SYRNIUM NEBULOSUM. Resident; few records; one breeding pair found in the northeastern part of the State. 369. =Spotted owl.= SYRNIUM OCCIDENTALE. Resident; not common; a little doubt as to its identity; but Mr. Aiken vouches for its presence in the State. 371. =Richardson's owl.= NYCTALA TENGMALMI RICHARDSONI. Rare winter visitor; a northern species. 372. =Saw-whet owl.= NYCTALA ACADICA. Resident; not uncommon; occurs throughout the State below 8,000 feet. 373. =Screech owl.= MAGASCOPS ASIO. Rare resident; the eastern analogue of the next. 373e. =Rocky Mountain screech owl.= MAGASCOPS ASIO MAXWELLIÆ. 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 PALLESCENS. Common resident; breeds on the plains and in the mountains.