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.