. Birds of the United States east of the Rocky Mountains, a manual for the identification of species in hand or in the bush;. Birds; Birds. FAM. XXIX. HAWKS, EAGLES, ETC. 207 24. White Gyrfalcon (353. Fdlco isldndus). — This arctic falcon, which has been found in northern Maine, is, in good plumage, a slightly mottled white all over. There is apt to be more or less of brownish and grayish in bars or streaks on the shoulders, central tail feathers, and head. Length, 22 ; wing, 16 ; tail, 9| ; tarsus, 2|; _ culmen, 1. Arctic regions, wandering; south to northern Maine. 25. Gray Gyrfalcon (354. F
. Birds of the United States east of the Rocky Mountains, a manual for the identification of species in hand or in the bush;. Birds; Birds. FAM. XXIX. HAWKS, EAGLES, ETC. 207 24. White Gyrfalcon (353. Fdlco isldndus). — This arctic falcon, which has been found in northern Maine, is, in good plumage, a slightly mottled white all over. There is apt to be more or less of brownish and grayish in bars or streaks on the shoulders, central tail feathers, and head. Length, 22 ; wing, 16 ; tail, 9| ; tarsus, 2|; _ culmen, 1. Arctic regions, wandering; south to northern Maine. 25. Gray Gyrfalcon (354. Fdlco rusticolus). — A northern fal- con, with the upper parts, including the tail, blackish-gray, barred with buffy-white, and the under parts white, blotched and streaked with blackish, but the under tail coverts are barred with brownish. Length, 20-25 ; wing, 13|-16| ; tail, 8-10 ; tarsus, 2\ ; culmen, 1. Arctic regions, straggling south in winter to the northern United States. The Gyr- falcon (354a. F. r. gyrfalco) of the Arctic regions has been found as far south in winter as Rhode Island. It is similar to the gray gyrfalcon, but lacks the regular bars of the upper parts ; sometimes there are no bars at all; the under parts are always heavily streaked with blackish. The Black Gyrfalcon (351b. F. r. obso- letus) of Labrador is casually found as far south as Long Island. This, as its common name indicates, is a very dark- colored gyrfalcon. The upper and lower parts are an unbarred slaty- black ; even the tail is nearly unbarred. All the gyrfalcons are rare in the United States. 26. Prairie Falcon (355. Fdlco mexicclnus).—A bold, grace- ful, low-flying, western, grayish-brown falcon, with the lower parts white, streaked and spotted with the color of the back. The primaries and the inner webs of all but the middle tail feathers are blotched or barred with buffy. The young has buffy margins to the feathers of the upper parts. This, as its. Gray Gyrfalcon. Please note that
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1898
