FALCONS, HAWKS, EAGLES, ETC. 



209 



S64a» F. r. gyrfolco (f.inn.^. Gyukai-cox. — Head streaked with 

 Imlly white and fusenus or lihiel< ; haek varyiiij,' from browui.nh iL'ray to shity 

 fuscous, without conipiete l)ars and sometimes entirely unluirrcd; tail of the 

 same color as the t)aei'C, witii indistinet or iticoinplete lighter liars; under 

 jiurts heavily streaketl with whitish ami fuscous. 



h'lOKjc. — "Northern Kurope ami arctic America, from northern Labrador 

 and coasts of Hudson Bay to Alaska" (Kidgw.). 



354b. F. r. obsoletus (GmeL). Black Gyrkalcon.— Upper parts 

 uniform slaty fuscous, witliout bars; tail the same, without or with oidy 

 broken bars; under parts of the same color us the back; the fcatiicrs with 

 partly concealed butfy spots. 



R(Ui(ji:. — Labrador; southwanl in winter, casually to Long Islaml. 



lii tiuirks. — Gyrfalcons are so rare in collections that the descriptions here 

 given can not be considered as applying to the species lus a whole, but rather 

 to the individuals from which the tlescriptions were taken. /'. ixliuulus is the 

 lightest colored, auil /'. /■. oljuolitns is the darkest of uur sui)poscd four forms, 

 while the others are intermediate between these two. 



356. Falco mexicanus Srhlnj. I'liAHin; Falcon. ./(/.—Above, 

 grayish brown; primaries and inner wcbs of all but the mitUllc tail-feathers 

 with numerous bully bars or spots; bcU)w, white, streaked and spottcil with 

 dark grayish brown. Jiu. — Similar, but witii the upper parts margineil with 

 ochraeeous-butf or butty. 6 L., IT-iX'; W., I'J-jo; T., 7-00. 



EatKje. — Western I'nitcd States, eastward casually to Illinois. 



Neat, on clitt's, sometim> •< in hollow trees. I:'<j(jx, two to five, "creamy 

 .white, vinaceous-whiti', or pale vinaceous-iiutfy, sprinkled, speckled, or 

 irregularly spotted with madder-brown, -J-ot; x I'dO" (Kidgw.;. 



"The Prairie Falcon, a.'^ the luuno implies, is a typical plains bird, 

 and inhabits the dry interior. . . . 



"The flight of this Hawk is swift and graceful, thoiifjh in most 

 cases it is carried on at no great distance from the ground. It is not 

 a shy bird, except in sections where it has been persecuted and has 

 learned that man is its worst enemy" (Fisher). 



356. Falco peregrinus anatum I //on ('/).'). Dick IIaw-k. Ad.— 



Upper parts dark bluish slate-color; primaries barred with ochraccous; tail 

 indistiiu'tly barred with blackish and tipped with white; under )>arts crcam- 

 butl', barred and spotted with black, e.xcopt on the breast. /;/*. — Upper parts 

 fuscous, more or less margiiu'd with ochraccous or rufbus ; region beluw the 

 eye black ; ear-coverts butfy; wings as in the ad.; upper surface of the tail 

 barred with grayish, under surface baridl with ochraeeous-butf : under parts 

 crcam-butf or ochraeeous-butf, streaked. sj)otti'd, or liarred with black. ^ L., 

 lti-00; W., 12"_'r); T., •;•')(>; H. from X.. -08. 9 1... lH-dO; W., 14-oo; T.. T-''<>. 



RatHje. — North America and the greater part of South America, breeding 

 locally from our Soutlicrn States northward. 



Wasliington, rare and irregular W. V. Sing Sing, casual. Cambridge, 

 rare T. V., casual in winter. 

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