BIRDS OF NORTH AND MIDDLE AMERICA 255 



habits; Madera County, Calif.). — Grove, Murrelet, xxvii, 1946, 33 (Lopez 

 Islands, Wash.). — Gullion, Condor, xlix, 1947, 210 (chased from duck 

 hawk's kill). — Hubbard, Condor, xlix, 1947, 83 (Nov. 27, 1946, feeding on 

 coot; California). 

 Buteo jamaiccnsis socorroensis van Rossem, Occ. Pap. Mus. Zool. Louisiana State 

 LTniv., No. 21, 1945, 290 (Sonora; Alamos; uncertain ident.). 



BUTEO JAMAICENSIS FUERTESI Sulloii and Van Tyne 



FuERTEs's Red-tailed Hawk 



Adult (sexes alike). — Similar to the light phase, adult, of Buteo 

 jamaicensis calurus, but with the underparts, including the under wing 

 coverts paler, the dark streaks across the breast and flanks greatly 

 reduced, the streaks reduced to a fine shaft line and ochraceous tawny 

 instead of umber or sepia; thighs immaculate or slightly and indistinctly 

 barred with tawny-buff; the barring on rectrices and upper tail coverts 

 much reduced; crown and occiput with more dusky rufous instead of 

 buffy edges to the feathers producing a less variegated appearance; 

 less rufescent on the interscapulars and upper back. 



Juvenal. — Similar to that of the light phase of Buteo jamaicensis 

 calurus, but somewhat more rufescent above and less spotted below. 



Natal down. — Not recorded. 



Adult male.— Wing 385-402 (393.2); tail 205-218 (212.1); culmen 

 from cere 25.5-27 (26.1); tarsus 78-91 (87.4); middle toe without 

 claw 43.5-47 (46.1 mm.) (8 specimens). 



Adult female.— Wmg 425-436 (430.0); tail 220-228 (224); culmen 

 from cere 26-28.5 (27.6); tarsus 91-94 (93.2); middle toe without 

 claw 48-52 (49.8 mm.) (4 specimens, includmg the type). 



Range. — Resident from central Chihuahua to southern Texas (Sam- 

 uels; Boerne; Glenn Sprmg; Uvalde; Marathon; Hot Springs; Pai- 

 sano Peak, 5,000 feet; Corpus Christi; Alpine; Calamity Creek Bridge; 

 Mara villas Creek; Pena Creek; Santiago Alountain); probably also 

 northwestern Texas, Oklahoma, southern New Mexico, and northern 

 Coahuila, to south-central Nuevo Leon — Cerro Potosi (spec). In 

 winter has been taken in southwestern Louisiana (Iberville and Cam- 

 eron) and in Sonora. 



Type locality. — Calamity Creek Bridge, 22 miles south of Alpine, 

 Brewster County, Tex. 



Buteo borealis calurus (not of Cassin, 1855) American Ornithologists' Union, 

 Check-list, ed. 3, 1910, 157, part; ed. 4, 1931, 66, part.— Swann, Synopt. 

 List Accip., pt. 2, 1919, 47, part; Synop. Accip., ed. 2, 1922,77, part; Monogr. 

 Birds Prey, i, 1926, 392, part (monogr.). 

 Buteo jamaicensis hor calls Peters, Check-list Birds of World, i, 1931, 231, part. 

 Buteo jamaicensis fuertesi Sutton and van Tyne, Occ. Pap. Mus. Zool. Univ. 

 Michigan, No. 321, 1935, 1 (Calamity Creek Bridge, Tex.); Auk, liii, 1936, 

 117, in text (Texas); Misc. Publ. Mus. Zool. Univ. Michigan, No. 37, 1937, 

 20, 21, in text (Brewster County, Tex.; many records; fairly common res.; 

 descr.; weights; breeding; fig.). — Taverner, Condor, xxxviii, 1936, 70, 71, 



