Lemmings are small mouse like animals that live in the Artic tundra. Their color change, in summer they are brown and in winter they are all white. This kind of animals live in colonies. Lemmings are one of the favorite food of many artic animals. Lemmings weigh from 30 to 112g and are about 7 to 15 cm long. They generally have long, soft fur and very short tails. Lemmings have very sharp teeth which helps them gnaw through tangles of roots, moss and soil.They are herbivorous and they eat leaves, grasses, sedges, roots, bulbs, grubs and larva.
The behavior of lemmings is, much the same as that of many other rodents which have periodic population booms and then disperse in all directions seeking food and shelter that their natural habitat cannot provide. The enemies of the lemmings are: Foxes, hawks, wolves, weasels, owls and gyrfalcon. The lemmings live less than two years. They usually have three to seven babies after they are pregnant for three weeks. During summer all female lemmings are pregnant. Lemmings are good swimmer with water proof fur but when they go in the water in a big group most of them drown. Lemmings are the smallest animals in the tundra. This kind of animals are active all year round.