Lemmings (Muodes lummus).—These voracious little animals live in the far north of Europe, and sometimes make migrations in vast numbers, swimming across rivers and lakes, passing through towns and villages, and climbing over mountains and rocks. Troops of birds of prey fly above them, and they are followed by bears, foxes, martens, and weasels, so that their migratory flocks often disappear as rapidly as they make their appearance. They are about the size of a rat. The snowy lemming turns white in winter.
Marmot (Arctomys marmota).—The upper parts of the marmot are brownish black, its sides yellowish grey, while its lower parts are reddish brown. It attains a length of sixteen inches, and is found in both Europe and America. In North America, they are popularly termed woodchuck or groundhogs. The marmots live together in social troops in rocky caverns and feed on plants. In the autumn the marmots move into their winter quarters. There they sleep through the whole winter, huddled together in parties of three, five, and more, and apparently lifeless. In this state they can be rolled about like balls without being awakened until Spring, when they are usually hailed as weather prophets. Marmots are easily tamed, and can be trained to perform many tricks.
Mice are the best known of the rodents, which only too often do a great deal of harm by their predatory habits. Of these the domestic mouse (Mus musculus), a swift and pretty little animal, which is very much attached to our larder provisions. Even the elephant, the largest among animals, fears this tiny rodent.
The domestic rat (Mus rattus) became known in Europe in the twelfth century, and probably emigrated from Asia. The brown rats did not appear in Europe until the eighteenth century. They are stronger than the domestic rats, which they drive away or devour. Their food generally consists in kitchen refuse of all sorts. If driven by hunger they even eat their own kind.
Porcupine (Hystrix cristata).—This is quite a remarkable animal. It attains the size of a badger, and inhabits South Europe, Africa, and North America. Like the hedgehog, it is provided with a peculiar muscle, which enables it to erect a coat of spines whenever danger threatens, and it is thus protected against foxes and jackals, which often share the porcupine’s habitation, and would very much like to devour their fellow-lodger. In European porcupines, the spines or quills attain a length of from ten to twelve inches. Our American species has quills about three inches in length. The fore feet are supplied with sharp claws, which are very necessary to the animal for digging out its burrow. During the day the porcupines remain hidden in their burrows, but at night they go out in search of food.
Prairie Dog.—This small rodent animal of the squirrel family is found on the plains east of the rocky mountains. It resembles the marmot in appearance, and has well-developed claws on all the toes of the fore-feet; shallow cheek-pouches. The best known species is about one foot in length, and has a tail of about four inches. On the upper surface it is reddish-brown, variegated with gray. These animals live together in great societies on those portions of the prairies where the buffalo grass grows luxuriantly. Here they excavate burrows in the ground in contiguity to each other, and, when the little creatures are out, quite a busy scene is presented. The name is given on account of a resemblance between its cry and the bark of a small dog.
Rabbit. See [Hare].
Rat. See [Mice].
Squirrel (Sciurus vulgaris).—In the summer the squirrel is brownish red on the upper parts and white on the lower parts; in the winter, brown red and light grey mixed. The black, white, and spotted squirrels are rare. The tail of the squirrel is bushy and arranged in two lines of bristles; its ears are adorned with a tuft of hair. Squirrels prefer the forests of trees with pointed leaves to those with broad leaves, and are always in motion, being equally adept in climbing, running, and jumping from tree to tree. They feed on nuts, acorns, seeds of fir trees, young shoots, young birds, and birds’ eggs, and do a great deal of harm. They collect large stores for the winter, which they hide in hollow trees. Their nests are globular, and made of bark and leaves; they often build on the top of an old magpie’s nest. Their greatest enemy is the tree marten.