512. 
513. 
042 SYSTEMATIC SYNOPSIS. — RAPTORES — ACCIPITRES. 
coopert), or of very partial distribution in N. AW all cases, the sexes are alike or similar; 
the ? is larger than the @; the young are different from the adults; melanism is frequently 
exhibited. 
Analysis of Subgenera and Species. 
Five outer primaries emarginate or sinuate on inner webs ; tail more than 3 the wing ; bill high at base ; 
nostrils oval, with eccentric tubercle. (Parabuteo.) 
Tail blackish (with white base and tip); lesser wing-coverts and tibiz reddish ; general plumage 
blackish. Southwestern U.S.,common .. . se leh Us Pall RW saeiee Gy eo Mge yaues, Gems WUILLCUNCTILG roles 
Four outer primaries emarginate or sinuate on inner Ss 
Tail white, with a broad black subterminal zone and numerous very narrow, zig-zag, or broken, 
blackish cross-lines. Texas. . . - +» . . albocaudatus 513 
Tail mostly white, ashy-clouded ; manied ieee ise with rufous and eee? and with dark sub- 
terminal zone ; under parts mostly white. Cala.,one specimen known . . . +. «coopert 514 
Tail mottled with dusky and white, and with subterminal blackish zone; nhopane also reddish 
touches. Plumage almost entirely blackish, with fleecy-white bases of feathers. Kas. to Tex., 
little known .. . ah aise P35" op 4 By is ies ES _harlank 515 
Tail of adult chestnut- oo “with broad blnek capteaninal ent aa oehiers or mate ; no reddish on wing- 
coverts ; white prevailing on under parts, especially breast. Tail of young closely barred with 
grayish and blackish. Largest and most robust ; ar usually 14.00 or more; tarsus stout. 
IN. Alm. abundant: cian is Gees mace eein : - . « . borealis 516-519 
Tail of adult black, crossed by about 6 white ae ; primaries patted aim whites ; lesser wing-coverts 
reddish, like under parts. Tail of young dusky, numerously barred with whitish; under parts 
whitish, streaked with dusky. Less robust; wing usually under 14.00; tarsus slender. N. Am., 
abundant .. . « ate Be RAD nd BO op dao CD ACHAIES VERVE 1502 
Tail of adult black, w ith 3 Beal Shite zones on inner wees only of the fener! ashy on outer webs ; 
plumage black, spotted or not with white. Tail of young dusky, inner webs mostly yitite, 
black-barred, Southwestern U.S. ... . Pia AVG so oO GE a) Clee nenii WR 
Three outer primaries emarginate or sinuate on inner mee 
Tai] numerously and narrowly cross-barred with lighter and darker. Plumage extremely variable, 
but not extensively reddish underneath, nor cheeks with a dark mustache. a wing usually 
over 13.00. Chiefly western U.S., abundant . .. . . . Swainsoni 523 
Tail of adult blackish with about 3 light gray bands eeaoleal: R ede eae rexteusigele rufous ; 
a dark moustache. Small; wing under 12.00. Eastern U.S.,common . . . . pennsylvanicus 524 
Tail (of adult ?) crossed with numerous light and dark bars (6-8 of each); general color fuliginous, 
scarcely or not varied. Southwestern U.S... ... ... .. .. « . . . Orachyurus 882, 883 
* Heavy-weights; 5 outer primaries cut. 
B. unicin'ctus har’risi. (Lat. wni-, once; cinctus, girdled. To Edw. Harris.) HArrtis’s 
Buzzarp. Adult ¢ 9: General plumage blackish, more or less intense, sometimes rather 
dark chocolate-brown, blackening on wings and tail, but in any case pretty uniform over the 
whole body. Lesser and part of middle wing-coverts, lining of wings, and the tibize, brownish- 
red, or rich chestnut. Tail-coverts and base of tail broadly white, thus girdling the whole 
figure ; end of tail also white for an inch or more. Length of g about 20.00; extent 41.00— 
46.00; wing 12.50-13.50; tail 8.50-9.50; tarsus 3.00-3.25; middle toe without claw 2.00. 
Q larger; about 23.00; extent 43.00-47.00; wing 13.50-14.50; tail 9.50-10.50. Young: 
Less decidedly blackish, the upper parts varied with rusty-brown, lower quite tawny with 
dusky spots or streaks, chestnut of wings not unbroken, and white of tail less distinctly defined. 
Tibia tawny-white, distinctly barred with chestnut. But in any plumage the species is un- 
mistakable, forming a separate subgenus from Buteo proper, by some ranked as a genus; 
the loral region is extensively denuded to the eye, and furnished with short radiating bristles. 
In some respects it resembles Polyborus, being a sluggish, carrion-feeding bird, usually found 
associated with the caracara, turkey-buzzard, and black vulture. Tt is a common inhabitant of 
the warmer parts of America and over our Mexican border; abundant in some parts of Texas. 
Nest in a tree or bush; eggs commonly 2, measuring 2.00-2.10 x 1.70, white or whitish, 
unmarked or with faint brownish-yellow. (Parabuteo Ridg. Hrythrocnema Sharpe.) 
** Heavy-weights ; 4 outer primaries cut. 
B. albocauda’tus. (Lat. albus, white; caudatus, tailed.) WHITE-TAILED Buzzarp. Adult 
& 2: Tail and its coverts white, with a broad black subterminal zone, with numerous 
