CHICAGO ACADEMY OF SCIENCES. 
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The Indians value the skins of these birds very highly, using them as 
ornaments, and their feathers for the shafts of their arrows. They pay 
among themselves the same price for one as for a marten skin. It 
occupies the same nest, of sticks and a little straw, generally in the top 
of a high tree, for years. I have seen a ptarmigan {Lagopus albus) 
killed by one of them. Also from Kadiak (Bischoif )• D. 
3. Falco candicans Gmel. (11.) Jer Falcon. I learned from the 
residents at St. Michael's that a species supposed to be this one is not 
infrequent, though it did not come under my own observation. On the 
voyage home, however, on the 21st of October, 1866, when off the coast 
of Kamtschatka, a little north of Behring's Island, one of these birds 
alighted in the rigging of the ship and continued with us for several 
hours. B. 
4. Falco sacer Forster. (12a.) Under this name I indicate 
provisionally an ash - colored Falcon with transverse light bars above, 
found throughout the Anderson River, Lower Mackenzie and Yukon 
region, breeding on trees and cliffs indifferently. It never becomes 
white, and does not correspond at all with specimens of either gyrfalco 
or islandicus. As probably the bird meant by Forster, Philos. Trans., 
Vol. LXII (1772), 423, the name anticipates both candicans and islandi- 
cus, and may therefore be employed without reference to whether either 
of these last be synonymous. Baikd. 
Obtained a male of this species, which is a resident, though usually 
confined to the mountains, not frequenting the river, at Nulato, Feb. 10, 
1868. The iris is very dark browu and gives all the appearance of black 
eyes. D. 
5. Astur atricapillus Bon. (14.) Goshawk. Obtained at Sitka 
by Bischoff. Pair shot April 24th, 1867, a few miles north of JSIulato 
Fort, on the Yukon River. Nest on a large poplar, thirty feet above 
the ground, of small sticks. No eggs laid, but several nearly mature 
in the ovary of female. The nest was on a small island, in a thick 
grove of poplar. I find this species prefers such situations. This is the 
most common of the hawks in the Yukon valley and feeds largely on 
the white ptarmigan (X. albus), tearing off the skin and feathers and 
eating only the flesh. The eggs, four in number, are of a greenish 
■w hite and usually all laid by the first of May. I have received skins of 
this species ivom the Kuskoquim River. A resident. D. 
G. Accipiter fuscus Bon. (17.) Sharpshinned Hawk. Iris light 
yellow. A female was killed at Koyukuk, just above Nulato, on the 
Yukon, April 29, 1867. This hawk is highly prized by the Indians 
Avho use the feathers on their arrows and as ornaments during their 
dances. They count it as equal in value to one marten skin. Also 
obtained by Bischoff at Sitka. On the Yukon, this hawk is scarce, 
being, as far as I could learn, only a summer visitor. D. 
