. Handbook of birds of the western United States, including the great plains, great basin, Pacific slope, and lower Rio Grande Valley . GENUS LAGOPUS. ^^-^neral Characters. —Toes and tarsus densely feathered, tail less thantwc irds as long as wing, with long coverts reaching to WHITE-TAILED PTARMIGAN GROUSE, PARTRIDGES, QUAILS, ETC. 129 KEY TO SPECIES OF LAGOPUS. 1. General color of upper parts gray, in fall plumage. leucurus, p. General color of upper parts bufPy, in fall plumage. altipetens, p. 129. 304. Lagopus leucurus Sivains. ^^ EicL White-tailed Ptar-migan. Adults in winter
. Handbook of birds of the western United States, including the great plains, great basin, Pacific slope, and lower Rio Grande Valley . GENUS LAGOPUS. ^^-^neral Characters. —Toes and tarsus densely feathered, tail less thantwc irds as long as wing, with long coverts reaching to WHITE-TAILED PTARMIGAN GROUSE, PARTRIDGES, QUAILS, ETC. 129 KEY TO SPECIES OF LAGOPUS. 1. General color of upper parts gray, in fall plumage. leucurus, p. General color of upper parts bufPy, in fall plumage. altipetens, p. 129. 304. Lagopus leucurus Sivains. ^^ EicL White-tailed Ptar-migan. Adults in winter. — Pure white. Adults in summer : plumage spotted,barred, or mottled with black and rich buffy brown except for whitewings, tail, legs, and belly; the white tail hidden from above by longmottled coverts. Adults in fall: similar to summer, but dark parts moreuniformly gray, with finer markings and only a trace of buffy. Young :tail gray. Wing : , tail , bill .o7, tarsus ;^ Distribution. — Above timber line in Alaska, mountains of BritishColumbia, and higher peaks of Cascades, south to Hood and Jefferson. Nest. — On ground in open situations, a depression in the grass, or anactual nest of interlaced grass stems, weed tops, and feathers. Eggs :
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