335. Harris Hawk (Parabuteo unicinctus harrisi). L. ♂, 19; ♀, 22. Longer upper tail-coverts, base and tip of tail white. Ads. Shoulders, thighs and under wing-coverts, reddish brown; under tail-coverts white. Yng. Similar but streaked below with rusty, buff and black; legs barred with white. Notes. A long, harsh, Buteo-like scream. (V. Bailey.) Range.—Middle America from Panama north to southern Texas, rarely Mississippi and southern California. 337 Red-tailed Hawk (Buteo borealis). L. ♂, 20; ♀, 23. Four outer primaries notched. Ads. Tail rusty brown with a black band, sometimes broken, near its tip; below buffy white, a band of spots across the belly; legs usually without bars. Yng. Tail grayish brown with a rusty tinge and numerous blackish bars; upper tail-coverts barred black and white; below less buffy than in adult; legs more often barred. Notes. A shrill whistle, suggesting the sound of escaping steam. Range.—Eastern North America, west to the Great Plains, north to about latitude 60°; breeds throughout its range; winters from Massachusetts, Illinois and South Dakota southward. 337a. Krider Hawk (B. b. kriderii). Similar to [No. 337], but nearly or wholly white below. Ads. Usually without black tail band. Range.—"Great Plains of United States from Minnesota to Texas;, east irregularly or casually to Iowa and northern Illinois." (Bendire). 337b. Western Red-tail (B. b. calurus). Very variable in color. Ads. Sometimes sooty brown above and below with more or less rusty; in light phase resembles [No. 337], but tail averages paler and sometimes has more than one bar; the underparts are deeper and legs are usually barred with rusty. Yng. Similar to Yng. of [No. 337], but markings below heavier; flanks more barred. Range.—Western North America from Rocky Mountains to Pacific; north to British Columbia, south to central America; generally resident. 337d. Harlan Hawk (B. b. harlani). Ads. Above sooty brown; tail closely mottled with blackish, rusty and whitish; below varying from white, more or less-spotted on belly to sooty brown. Yng. Similar, but tail barred with blackish, gray, rusty or whitish. Range.—"Gulf States and Lower Mississippi Valley, north (casually) to Kansas, Iowa, Illinois and Pennsylvania; east to Georgia, and Florida." (Bendire).

339. Red-shouldered Hawk (Buteo lineatus). L. ♂, 18.3; ♀, 20.3. Four outer primaries notched. Ads. Lesser wing-coverts bright reddish brown. Yng. Below whitish streaked with brownish; lesser wing-coverts less reddish; primaries with rusty buff. Notes. A loud screaming keé-yer, keé-yer. Range.—Eastern United States to Oklahoma, eastern Kansas, eastern Nebraska and Minnesota, north to Maine, south to northern Florida; generally resident. 339a. Florida Red-shouldered Hawk (B. l. alleni). Smaller than [No. 339]. (W. ♂, 11.) Ad. Much grayer above, no rusty on head, much paler below. Range.—Florida north along coast to South Carolina; west along coast to eastern Texas. 339b. Red-bellied Hawk (B. l. elegans). Similar to [No. 339], but rusty of breast usually unbroken. Young with lower parts deep brownish or dusky prevailing; less buff on primaries. (Ridgw.) Range.—Pacific coast from Lower California north to British Columbia; east rarely to Colorado and western Texas. 342. Swainson Hawk (Buteo swainsoni). L. ♂, 20. Three outer primaries notched. Ad. ♂. Breast patch rusty brown. Ad. ♀. Breast-patch grayish brown. Dark phase. Brownish black more or less varied with rusty; tail obscurely barred. Yng. Below rich rusty buff with elongate black spots. Notes. Pi-tick, pi-tick, frequently repeated. (Bendire.) Range.—"Western North America from Wisconsin, Illinois, Arkansas and Texas to the Pacific coast; north to Arctic regions and south to Argentine Republic, casual east to Maine and Massachusetts. Breeds nearly throughout its North American range." (A. O. U.) 343. Broad-winged Hawk (Buteo platypterus). L. ♂, 15.8; ♀, 16.7. Three outer primaries notched. Ads. Tail with two whitish bands and a brownish tip; below barred with rusty brown. Yng. No buff in primaries; tail brownish with several black bars; below whitish, streaked with blackish. Notes. A high, sharp, keen, penetrating whistle. Range.—Eastern North America, breeds west to Plains, north to New Brunswick and Saskatchewan; winters from southern New Jersey south to northern South America.

Hawks and Caracara

340. Zone-tailed Hawk (Buteo abbreviatus). L. ♂, 19; ♀, 21. Ads. Tail with little if any white tip; inner webs of all but middle feathers with black and white bars. Yng. Browner; tail grayish brown; white on inner webs, with numerous blackish bars. Notes. Not unlike those of Buteo borealis. (Belding.) Range.—Tropical America north to southern Texas, southern Arizona and southern California. 344. Short-tailed Hawk (Buteo brachyurus). L. 17; T. 7. Ads. Above slaty gray, tail barred with black and tipped with white; sides of breast rusty; rest of underparts white. Dark phase. Blackish, forehead whitish; tail lighter than back, barred with black. Yng. Above blackish brown, below cream buff, without black markings. Notes. Somewhat resembling the scream of the Red-shouldered Hawk, but more prolonged. (Pennock.) Range.—Tropical America, north to eastern Mexico; rare in Florida. 345. Mexican Black Hawk (Urubitinga anthracina). L. ♂, 19; ♀, 21. Ads. Tail with a white tip and broad white band across all the feathers. Yng. Above brownish black, buff and rusty; below buffy striped with blackish; tail with several black and whitish bars. Notes. Piping cries like the spring whistle of Numenius longirostris. (Bendire.) Range.—"Tropical America in general, north to central Arizona, and the Lower Rio Grande Valley in Texas." (Bendire). 362. Audubon Caracara (Polyborus cheriway). L. 22. Tail white with a black end and numerous black bars. Ads. Breast and hindneck barred; belly black. Yng. Crown, back, and belly dark brown; hindneck, breast and belly streaked with buffy. Notes. Generally silent, but sometimes utters a prolonged cackling note. (B. F. Goss.) Range.—Northern South America, north to southern Texas, southern Arizona and Lower California; interior of southern Florida; resident. 363. Guadalupe Caracara (Polyborus lutosus). Resembles [No. 362], but has rump and upper tail-coverts dull brownish buff broadly barred with dull brown; tail brownish buff with broad bars of grayish brown bordered by narrower zigzag bars or lines of dusky; terminal band less than 2.00 wide. (Ridgway.) Range.—Guadalupe Island, west of Lower California.

341. Sennett White-tailed Hawk (Buteo albicaudatus sennetti). L. ♂, 21; ♀, 23. Three outer primaries cut. Ads. Grayish slate above. Yng. Above brownish black; breast usually white, throat blackish, belly heavily marked with rusty and blackish; sometimes wholly black below; tail generally silvery gray., white on inner webs with numerous indistinct blackish bars. Notes. A cry much like the bleating of a goat (Merrill.) Range.—"From southern Texas and Arizona south to Mexico." (Bailey.) 347a. American Rough-legged Hawk (Archibuteo lagopus sancti-johannis). B. .7 deep, smaller than in [No. 348]. L. ♂, 21; ♀, 23. Legs feathered to the toes. Ads. Basal half of tail white, end half barred with black; belly with more or less black. Yng. No black bars on end half of tail; buffier below, more black on belly. Black phase. Black more or less varied with brown and rusty as it approaches light plumage of ad. or yng; but to be known by feathered legs. Range.—North America; breeds north of United States; winters south to Virginia, Missouri and central California. 348. Ferruginous Rough-Leg (Archibuteo ferrugineus). B. 1. deep, larger than in [No. 347a]; L. ♂, 22; ♀, 24. Legs feathered to toes. Ads. Above rich rusty streaked with black; legs rusty barred with black; tail grayish sometimes washed with rusty. Yng. Above blackish brown margined with rusty; below white; breast with a few streaks; legs spotted; tail with inner webs and base white; outer webs grayish. Dark phase. Sooty brown more or less varied with rusty; tail as in ad. Range.—"Western North America from the Plains (east North Dakota to Texas), west to the Pacific and from the Saskatchewan region south into Mexico; casually east to Illinois. Breeds from Utah, Colorado and Kansas north to the Saskatchewan Plains." (A. O. U.) 355. Prairie Falcon (Falco mexicanus). L. ♂, 17; ♀, 20. A blackish patch on the sides. Ad. ♂. Above including middle tail feathers, grayish brown; back with more or less concealed buffy bars. Ad. ♀. No buffy bars on back. Yng. Above margined with rusty and whitish; head much as in ad. Notes. Kee, kée, kee and a sort of cackle. (Bendire.) Range.—"United States from the eastern border of the Plains to the Pacific and from the Dakotas south into Mexico; casual east to Illinois. Breeds throughout its United States range." (A. O. U.)

Eagles and Gyrfalcon