The White Owl, also known as snow owl, is a kind of raptor, belonging to the larger owl, with a body length of about 50-71 cm. The average body length of the female is 66 cm, and the average body length of the male is 59 cm; Because the species is distributed in the high latitude and high altitude cold regions, the whole body is almost pure white, the tip of body feather is nearly black, the head of snow owl is round and small, the face plate is not obvious, there is no common ear like feather cluster of other owls, and the mouth base is covered with bristle like whisker feathers, almost covering the whole mouth. The male is white, with light brown eyes and face and a few dark brown spots.
Snow owls are solitary birds with designated sites. In the year of sufficient food, there are only two pairs of snow owls in an area of 1 square kilometer on average, and less in the year of lack of food. Snow owl is a resident bird in the Arctic tundra. It lives in the tundra from sea level to 3000 meters above sea level. It may also live in the saline meadow of low land or the wet meadow of fresh water with poor drainage. It is mainly for foraging in the high latitudes and high altitudes of the Northern Hemisphere. Even in summer, their range of activity is at 60 n ° to the north of. Because their prey populations vary greatly, they need to make frequent adjustments, which makes snow owls a frequent migratory bird.