Beaver pond

“ There is a chain of five of these beaver-ponds, which begins quite near the house. Often in the early morning, we see places where they have been at work all night, mending their dams, cutting down willow bushes, and even felling trees of some size with a smooth cut that a skillful woodman might be proud of; but all day long there is never a sound of work in the silent village. So, hearing something plunging into the pond in the late twilight, I stole to the bank and looked through an opening in the willow thicket. ”

“ The beaver is intimately associated with water. He is not a landsman, and only necessity will cause him to go far from the water. The water in a main beaver pond is usually three or more feet deep, a depth needed all the year around. Where nature has provided a place of this kind that is close to his food-supply, the beaver uses it; he will not trouble to build a dam and form a pond of deep water unless this is necessary. ”

“ But why do beaver need or want the pond which the dam forms? They need it for the purpose of maintaining water of sufficient depth and area to enable them to move about in safety, and to transport their food-supplies with the greatest ease. Above all, the pond is a place of refuge into which the beaver can constantly plunge and have security from his numerous and ever watchful enemies. The house-entrance must be kept water-covered. In the water the beaver is in his element. On the land he is a child lost in the wilds. He has extremely short legs and a heavy body. ”

“ So soon as a beaver raises its nose on the surface of the pond, it smells the castoreum on the twig, swims up to convince itself whether it emanates from a stranger, and while going on land steps on the trap, which closes and catches its forefeet. It darts away with the trap into deep water, and wrestles furiously with the torturing iron, for which reason a beaver thus captured is never found to have sound teeth—till, quite exhausted, it tries to rise to the surface to breathe. ”

“ Running water dissolves and erodes away the earthy materials with which it comes in contact. The presence of a beaver pond and dam across a stream’s highway prevents the wearing and the carrying away of material. They not only prevent [Pg 218] erosion or wearing away, but they take soil and sediment from the water which comes to them and thus cause an upbuilding. Hence the presence of beaver ponds along streams causes an accumulation of sediment and soil. In time these fill rocky channels and cañons, widen and lengthen valleys, and thus extend the productive area of the earth. ”

“ Beaver have great fun while growing up. Posted on the edge of the house, they nose and push each other about, ofttimes tumbling one another into the water. In the water they send a thousand merry ripples to the shore, as they race, wrestle, and dive in the pond. They play on the house, in the pond, and in the sunshine and shadows of the trees along the shore. ”

“ Beaver commonly fill their ponds by damming a brook or a river. But this colony obtained most of its water-supply from springs which poured forth abundantly on the uppermost terrace, where the water was led into one pond and a number of basins. Overflowing from these, it either made a [Pg 86] merry little cascade or went to lubricate a slide on the short slopes which led to the ponds on the terrace below. The waters from all terraces were gathered into a large pond at the bottom. This pond measured six hundred feet in circumference. ”

“ The only variation of this winter-existence comes when there is an open spring-hole in the pond or a bit of swift water at the inlet. The imprisoned beavers make glad use of such an opening, which they may have to reach by a long swim under the ice. They come every day to play in the free water or to sit erect beside it, sunning themselves by the hour on pleasant days, combing their fine fur meanwhile, or coaxing a snarl out of it, using for the latter purpose the peculiar split claw which every beaver carries on one of his hind toes. ”

“ In those days beaver was one of the most valued furs. The creature is very easy to trap; so the discovery of the pond was like the finding of a bag of gold. They skirted its uncertain edges and Quonab pointed out the many landing places of the beaver; little docks they seemed, built up with mud and stones with deep water plunge holes alongside. Here and there on the shore was a dome-shaped ant's nest with a pathway to it from the pond, showing, as the Indian said, that here the beaver came on sunny days to lie on the hill and let the swarming ants come forth and pick the vermin from their fur. ”

“ THE PERSISTENT BEAVER I saw a forest fire sweeping down upon the Broken Tree Beaver colony, and I knew that the inhabitants could take refuge in their earthy, fire-proof houses in the water. Their five houses were scattered in the pond like little islands or ancient lake dwellings. A vigorous brook that came down from the snows on Mount Meeker flowed through the pond. Towering spruce trees encircled its shores. ”

“ They also made a shallow ditch in the bottom of the pond that extended from the house to the canal that united the two ponds.
The following summer was a rainy one, and the pond filled with sediment to the height of the dam. Most of this sediment came from the landslide débris or its sliding place. The old Broken Tree colony was abandoned.
Different from most animals, the beaver has a permanent home. The beaver has a strong attachment, or love, for his old home, and will go to endless work and repeatedly risk dangers to avoid moving away. ”

“ These dams will easily support the weight of a man. In the pond area or on the dam, a conical mass of mud and twigs, (the beaver lodge) some three to five feet high may be found, which contains the home of the beavers using that pond. Each lodge has an underwater entrance which is constantly in use, winter and summer. While beavers work mostly at night, it has been a regular practice in the Park to observe them swimming in their ponds just before nightfall. The Mill Creek, Hidden Valley, and Colorado River Valley areas have been especially good locations for sight of beaver. ”

“ In the United States there are a number of counties and more than one hundred streams and lakes named for the beaver; upwards of fifty post-offices [Pg 43] are plain Beaver, Beaver Pond, Beaver Meadow, or some other combination that proclaims the former prevalence of this widely distributed builder. The beaver is the national emblematic animal of Canada, and there, too, numerous post-offices, lakes, and streams are named for the beaver.
BEAVER PONDS
Beaver skins lured the hunter and trapper over all American wilds. ”

“ Each autumn beaver pile up near by the house, a large brush-heap of green trunks and limbs, mostly of aspen, willow, cottonwood, or alder. This is their granary, and during the winter they feed upon the green bark, supplementing this with the roots of water-plants, which they drag from the bottom of the pond.
Along in May five baby beaver appear, and a little later these explore the pond and race, wrestle, and splash water in it as merrily as boys. Occasionally they sun themselves on a fallen log, or play together there, trying to push one another off into the water. ”

“ Dragging their tree cuttings to the pond was slow, hard work, and it was also dangerous work for a slow-moving beaver to go so far from the water. A beaver is heavy bodied and short-legged. With webbed hind feet he is a speedy swimmer, but on land he is a lubber and moves slowly and with effort.
A few days later the purpose of the hole in the ice of the frozen pond was made plain. A freshly swept trail in the snow led to it out of the woods. The beavers were taking their green aspen cuttings through the hole into the pond for their winter’s food. They had begun storing winter food at last. ”

“ His first concern is for a stout dam across the stream that will give him a good-sized pond and plenty of deep water. To understand this, one must remember that the beaver intends to shut himself in a kind of prison all winter. He knows well that he is not safe on land a moment after the snow falls; that some prowling lucivee or wolverine would find his tracks and follow him, and that his escape to water would be cut off by thick ice. So he plans a big claw-proof house with no entrance save a tunnel in the middle, which leads through the bank to the bottom of his artificial pond. ”

“ A plunge down the hole at the centre of the lodge, and a dark form would shoot out at the bank of the river. Perhaps a beaver's head, dripping with water would be poked up, only a few feet from the mud house, or maybe they would go the entire width of the pond before coming to the surface, for they are great swimmers, and can stay down for several minutes without coming to the surface to breathe. ”

“ This canal was new and probably had been dug especially for this harvest. For sixty feet of its length it was quite regular in form and had an average width of thirty inches and a depth of fourteen. The mud dug in making it was piled evenly along the lower side. Altogether it looked more like the work of a careful man with a shovel than of beaver without tools. Seepage and overflow from the ponds above filled and flowed slowly through it and out at the farther end, where it swept down the long slide into the big pond. ”

“ Inexperienced hunters often try to get the beaver by chopping, digging, or even blasting with gunpowder a hole into the beaver house. If the pond is well supplied with kitchens, or breathing places, the beavers need only laugh at such hunters, for just as soon as they become alarmed by these outside noises they plunge into the water, which is always open in the warm house, and dive out under the outer edge and away they go under the thick ice to the kitchens, which are so cunningly hid away. ”

“ Ofttimes, too, in building the dam he does it by piling up the material dug from a ditch which runs parallel and close to the dam, and which is useful to him as a deep waterway after the dam is completed.
In transporting trees for food-supply, water transportation is so much easier and safer than land, that wherever the immediate surroundings of the pond are comparatively level the beaver endeavors to lead water out to tree groves by digging a canal from the edge of the pond to these groves. ”

“ Next day the mother died too, and the Beaver left the burrow and went out into the world alone. I really think his heart was broken, though it continued to beat for several months longer.
Just northeast of the Glimmerglass there lies a long, narrow pond, whose shores are very low and swampy, and whose waters drain into the larger lake through a short stream only a few rods in length. Hundreds, perhaps [38] thousands, of years ago the narrow strip of land that separates them may possibly have been a beaver-dam, but to-day it is hard to tell it from one of Nature's own formations. ”

“ Around this pond there must be enough beaver-skins to keep them in groceries and tobacco and whiskey for a long time to come. But to find a city is one thing, and to get hold of its inhabitants is another and a very different one. One of the Indians was an elderly man who in the old days had trapped beaver in Canada for the Hudson Bay Company, and he assumed the direction of the work. First of all they chopped holes in the ice and drove a line of stakes across the stream just above the pond, so that no one might escape in that direction. ”

“ The constant flow of the spring water prevented thick ice from forming, both around the food-pile and between it and the house-entrance.
Large numbers of beaver do not possess a house. Beaver who live without a dam or pond commonly do not build a house, but are content with a burrow or a number of burrows in the banks of the waters which they inhabit. In the severe struggle to live, there is a tendency on the part of the beaver to avoid the building of dams and houses, as these reveal their presence and put the aggressive trapper on their trail. ”

“ The dam is on rare occasions broken by late spring ice-jams. Sometimes the ice-cakes pile up on the dam and raise the water in the pond to such a height that it rises in the house and drives the beaver forth. A few beaver houses that are situated in places where the ice or spring floods may raise the water much above normal level are shaped to meet this trouble. The house is built higher and the room internally is twice the usual height. Thus there is space for the beaver to build a “platform bed” on the floor and thus raise themselves a foot or more above the common level. ”

“ When there is nothing else to do, the beaver apparently comes into the pond a few times each day for a swim. In the midst of swimming he rises at times to the under surface of the ice and, with his nose against it, exhales a quantity of air. ”

“ We have seen the beaver as a dam-maker and a house-builder, but we have not yet considered him as a maker of canals. This we will now proceed to do. In the construction of the dam and lodge, a great quantity of wood is, as we have seen, required, and when the trees do not grow very thickly, those on the edge of the pond are soon cut down and made use of, and gradually, as more and more fall, the beavers have to go farther and farther away from the water, in order to procure fresh timber. ”

“ Beaver frequently show good judgment in that important matter of selecting a site for the house. Ice and sediment are two factors with which the beaver must constantly contend. In the pond the house is commonly placed in deep water, and apparently where the depth around it will not be rapidly reduced by the depositing of sediment. Keeping the house-entrance, the harvest-pile basin, and the canals from filling with sediment is one of the difficult problems of beaver life. ”