These water-loving animals rely mainly upon their native element for the movement of lumber and food, and to aid this they employ engineering skill that is rivalled only by their feats of tree-cutting and dam-building. This constructive faculty is shown largely in their canal-digging. From one small stream to another, or from one lake to another, they excavate canals from three to four feet in width, with a water depth of two feet, and occasionally one hundred and fifty to two hundred feet in length. The amount of labour they perform is almost unbelievable; every particle of dirt is carried away between their chin and fore-paws. This earth is sometimes used in plastering up a nearby dam or repairing their winter home. Small and tender twigs are transported to the vicinity of their lodges, and then sunk for winter food.
Mr. Morgan has made a close study of these canals, and in speaking of them he says that when he first saw them, and heard them called canals, he doubted their artificial origin; but upon examination he found that they were unquestionably beaver excavations. He considers these artificial canals, by means of which the beavers carry their wood to their lodges, the supreme act of intelligence on the part of these wise animals. Even the dam, remarkable as it is, does not show evidence of greater skill than that displayed in the making of these canals. No one who has ever understood the ways of the beaver can believe that he is not exceedingly intelligent. The banks of these canals soon become covered with growing plants and moss, and they look not unlike slow sluggish streams winding through the marshy lands.
THE BEAVER IS THE GREATEST OF ALL ANIMAL ARCHITECTS. HIS SKILL IS EQUALLED ONLY BY HIS PATIENCE.
The beaver huts, or "lodges" as they are usually called, look not unlike beehives, somewhat broader at the base, with thick walls and roof, four to six feet in thickness. They are formed of numbers of poles, twigs, and small branches of trees, woven together and plastered with mud, in the same way that the dams are made. Inside the house are circular chambers formed of mud, which have been smoothed and polished like waxed floors by the feet of the occupants. Around the outer border of each polished floor is dry grass used for Mrs. Beaver's nursery, and here the young beavers sleep and play.
From the outside these beaver huts resemble Esquimaux snow-houses, being almost circular in form, and domed. The walls are quite thick enough to keep out the cold, but with all the beaver's ingenuity, he is helpless against trappers. Summer and winter they are hunted, until now they are fast becoming extinct. How few people seem fully to realise and care what is being done to wild animals! They do not seem to know that it is a crime to take the life of a being unnecessarily. Only human life is sacred to them! To realize the wonderful work of beavers, and then to act as we do toward them is unworthy of our civilisation.
An interesting cousin of the beaver, the musquash or muskrat, and called by the Indians the beaver's "little brother," is also a house-builder and engineer of no mean abilities. He is at home throughout the greater part of North America, and, like the beaver, frequents the regions of slowly flowing streams and large, reed-bordered ponds. Here he mingles in groups of his own kin, and together they build houses, work and play, dive and swim, with almost as much skill as their big beaver brothers.
The muskrat is a skilled engineer, and delights in tunnelling. His home consists of a large rounded chamber which is reached by a long burrow from the side of a stream. From his main living-room are oftentimes found a number of smaller chambers or galleries, and these are used to store food in the form of delicate roots and bits of bark. Some of the more ambitious muskrats build large houses on piles of mud which rise out of the water. These houses are usually made of heaps of dead grass and weeds which are cemented together with mud and clay; at other times they contain no mud or clay, and seem to be only piles of tender roots and swamp grasses to be used for food during the long, cold winters.
From his physical appearance, the muskrat is well prepared to do his work: he is stoutly built, with a body about a foot in length, not including the tail; has small eyes, and tiny ears, partly covered with fur. In the winter, as food gets scarce, he begins to eat even the walls of his house, and by the time his home is gone—spring has arrived!