Part 25

312. =Band-tailed pigeon.= COLUMBA FASCIATA. Summer resident; local; breeds from 5,000 to 7,000 feet and occasionally higher.

316. =Mourning dove.= ZENAIDURA MACROURA. Summer resident; very abundant; breeds everywhere below the pine region up to 10,000 feet, though usually a little lower; in fall ranges up to 12,000 feet.

319. =White-winged dove.= MELOPELIA LEUCOPTERA. Four records of this straggler in Colorado; its usual range is subtropical, though not uncommon as far north as the southern border of the United States.

325. =Turkey vulture.= CATHARTES AURA. Common summer resident; breeds from plains to 10,000 and even 12,000 feet.

327. =Swallow-tailed kite.= ELANOIDES FORFICATUS. Summer visitor; rare or accidental; bird of the plains, not regularly west of central Kansas.

329. =Mississippi kite.= ICTINIA MISSISSIPPIENSIS. Accidental; two records; a bird of eastern and southern United States, and southward.

331. =Marsh hawk.= CIRCUS HUDSONIUS. Common resident; most common in migration; a few remain throughout winter; breeds on plains, and in mountains to 10,000 feet; in fall may be seen at 14,000 feet.

332. =Sharp-shinned hawk.= ACCIPITER VELOX. Common resident; much more common in mountains than on plains; breeds up to 10,000 feet.

333. COOPER'S HAWK. ACCIPITER COOPERI. Common resident; breeds from plains to 9,000 feet.

334. =American goshawk.= ACCIPITER ATRICAPILLUS. Resident; not uncommon; breeds from 9,000 to 10,000 feet; more common in winter than summer.

334a. =Western goshawk.= ACCIPITER ATRICAPILLUS STRIATULUS. Winter visitor; rare, if not accidental; Pacific Coast form; comes regularly as far east as Idaho.

337a. =Krider's hawk.= BUTEO BOREALIS KRIDERII. Resident; not uncommon; nests on the plains; no certain record for the mountains.

337b. =Western red-tail.= BUTEO BOREALIS CALURUS. Abundant resident; this is the Rocky Mountain form, of which Krider's hawk is the eastern analogue; the ranges of the two forms overlap on the Colorado plains; calurus breeds from plains to 12,000 feet; not a few winter in the State.

337d. =Harlan's hawk.= BUTEO BOREALIS HARLANI. Rare winter visitor; one specimen; natural habitat, Gulf States and lower Mississippi Valley.

339b. =Red-bellied hawk.= BUTEO LINEATUS ELEGANS. Rare migrant; Pacific coast species.

342. =Swainson's hawk.= BUTEO SWAINSONI. Common resident; breeds everywhere below 11,000 feet.

347a. =American rough-legged hawk.= ARCHIBUTEO LAGOPUS SANCTI-JOHANNIS. Somewhat common winter resident; arrives from the north in November and remains till March.

348. =Ferruginous rough-leg.= ARCHIBUTEO FERRUGINEUS. Rather common resident; breeds on plains and in mountains; winters mostly on plains and along lower streams.

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.