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.
As characteristic birds of the snow-region may be mentioned the alpine chough (Pyrrhocorax alpinus), which is frequently seen at the summits even of the loftiest mountains, the alpine swift (Cypselus melba), the wallcreeper (Tichodroma muraria), snow-finch (Montifringilla nivalis) and ptarmigan (Lagopus mutus); the geographical distribution of this last being similar to that of the mountain hare.
Americanus), in the arctic fox (Canis lagopus), in the stoat and ermine, and among birds, in the ptarmigan, and some other species of Lagopus.
Lagopus), a very distinct species characterized by the hairy soles of its feet, the short, blunt ears, the long, bushy tail, and the great length of the fur in winter.
The reindeer, arctic fox (Canis lagopus), hare, wolf, lemming (Myodes obensis), collar lemming (Cuniculus torquatus) and two species of voles (Arvicolae) are the most common on land.