Eagles and Gyrfalcons, 
"349. Golden Eagle (Aquila chrysaétos). L. oi, 30 
35; &, 35-40; Ex. o', 78-84; 2, 84-90. (Ridgw.) Legs 
feathere1 to toes. Ads. Back of head and nape paler 
than body; basal two-thirds of tail white. Yng. Base 
of tail with broken grayish bars. Notes. A shrill, 
hee-kee-kee, and, when alarmed, &zah-kiab repeated a 
number of times. (Bendire.) 
Range —Northern parts of northern hemisphere; in America south 
into Mexico; rare east of Mississippi, more common in Rocky Mount- 
ains and mountains of Pacific coast. 
pm $352. Bald Eagle (Halsawetus leucocephalus). L. o, 
2. 
33; 2, 35; Ex. 3, 84; 2, 89. Legs not feathered to 
toes. Ads. Head, neck and tail white. Yung. Head 
and body blackish, more or less varied with white; 
tail blackish mottled with white. Notes. Of the male, 
a loud, clear cac cac-cac; of the female harsh and brok- 
en. (Ralph.) 
Range.—North America breeding locally throughout its range, more 
frequently near the Atlantic coast; resident in United States. 
352a. Alaska Bald Eagle (H./. alascanus).  Simi- 
lar to No. 352, but larger. W., 23.8; 2, 24.6; T. 
Oks, Si Lasalle eh Ac lsu Sez (Townsend.) 
Range.—Alaska. 
353. White Gyrfalcon (Falco islandus). L. o, 22; 
9,24. Tarsus feathered in front nearly to toes; only 
outer primary notched. Under tail coverts pure white. 
Ads. Below white with few or no black markings. 
Yng. Dark areas above larger, below with elongate 
blackish spots. 
wee regions, In America south in winter casually to 
aine. 
354. Gray Gyrfalcon (Falco rusticolus). L. &, 22; 
@,24. Tarsus feathered in front nearly to toes; only 
outer primary notched. Under tail coverts with dusky 
margins. Ads. Crown usually more white than 
dusky; above barred with blackish and grayish; below 
white, breast streaked; sides and legs barred with 
dusky. Yug. Above dark brown brown with broken 
buffy bars and margins; tail with white and brown 
bars of nearly equal width; below white everywhere 
streaked with blackish. 
Range.—Arctic regions; south in winter to the northern border of 
the United States; casually as far as Kansas and Maine. 
354a. Gyrfalcon (F. 7. gyrfalco). Similar to No. 
54, but head usually with more dusky than white; 
ack in ad. indistinctly barred with grayish. Yng. 
With dark stripes of lower parts usually about equal in 
width to white interspaces. 
Range.—'' Northern Europe and Arctic America, from northern Labra- 
dor and coasts of Hudson Bay to Alaska” (Rigg ws south in winter 
casually, to northern border of United States as far as Long Island. 
354b. Black Gyrfalcon (F. 7. obsoletus). Similar 
to No. 354, but much darker; above plain dusky with 
few or no buffy markings; below dusky margined with 
buffy, the former prevailing. Notes. A chattering 
ke-a, ke-a, ke-a, blending into a rattling scream. 
Range.—Labrador; south in winter to northern New England; cas- 
ually to Long Island. 
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