At high altitudes the mountain plover is found; the dusky grouse haunts the forests above 8000 ft.; the white-tailed ptarmigan is resident in the alpine regions; and on the plains are found the prairie sharp-tailed grouse and the sage-hen.
The desirable character of the grouse as game-birds has led to many attempts at their acclimatization, but usually these have been unsuccessful; the red grouse (Lagopus scoticus), however, the only endemic British bird, is naturalized in some parts of Europe.
Among game birds are three varieties of bustard, guinea fowl, partridges, sand grouse and wild geese.
The blue grouse and partridge are the principal game birds.
The dusky grouse and grey ruffed grouse are confined to the mountains and plateaus.
Among game birds the bustard, guinea fowl, sand grouse (kata), blue rock, green pigeon, partridge, including a large chikor (akb) and a small species similar to the Punjab sisi; quail and several kinds of duck and snipe are met with.
Its most characteristic animals and birds are the white-tailed jack-rabbit, pallid vole, sage hen, sharp-tailed grouse and greentailed towhee; the large Columbia ground-squirrel (Spermophflus columbianus) is common in that part of the zone which re west of the Rocky Mountains, but east of the Rockies it is replaced by another species (Cynomys) which closely resembles a small prairie dog.
While the pennated grouse (called the prairie chicken in Canada) has always been plentiful, the prairie hen (or chicken) proper is a more recent arrival from Minnesota and Dakota, to which states it had come from Illinois and the south as settlement and accompanying wheatfields extended north.
The game birds include quail (Bob White), ruffed grouse and a few pinnated grouse (once very plentiful, then nearly exterminated, but now apparently reappearing under strict protection), and such water birds as the mallard duck, wood duck, blueand green-winged teals, Wilson's snipe, and greater and lesser yellow legs (snipe).
Geese, ducks and grouse are numerous about the lakes and rivers.