Had these bears gone to explore, to see the opportunities of a new region? Or had they returned to old territory which they knew, perhaps to obtain some particular kind of food, or just to have an outing? If seeking new domains, it is possible that they would explore a number of localities before selecting one.
In a few localities bears migrate in the spring and return home in the fall. In these migrations the grizzly breaks his solitary custom and travels in company. Most likely the bears happen to be on the same route at the same time, and, like Pullman passengers, travel together without speaking.
I saw eight grizzly bears one November traveling single file northward from Middle Park. Back-tracking, I found that they had come from the mountainous empire around the southern end of this park. They crossed over into North Park in almost a straight line. Were they, I wondered, heading for a new home, or was this an annual foraging affair? The topography of the country traveled had some bearing on the common route taken, but whywere they traveling together? I heard of a number of bears traveling together in northern New Mexico.
On one occasion a hunter on No-Wood Creek in the Big Horns saw seven old grizzlies and two cubs together in the autumn. They were back-tracked to the Yellowstone Park. The garbage-dumps in the Park are frequented by neighboring bears and by numbers from outside the bounds of the Park.
As bears age, their teeth become broken and badly worn away. With difficulty they manage to live. They are often handicapped through loss of toes and by other injuries received in accidents and fights, and through a weakening of faculties due to age. Their normal life appears to be from thirty-five to fifty years.
In the mountains of the north of Yellowstone Park I came upon an extremely old, hard-looking bear. I sat for some time within forty feet of him, watching him rip an old log to pieces to get the ants and white grubs. I was so close that I could see his tongue as it busily licked to right and left. His red-looking eyes stared strangely. I think that he must have been nearly blind, and also that he had nearly lost his ability to scent. When I moved a little closer, he stopped eating, rose up, sniffed the airqueerly as though endeavoring to catch scent of me, then listened and looked. He was not at all sure of my presence, though looking in my direction. Two or three days later this old bear was killed. Many of his teeth were gone, and others were badly worn away. His claws were extremely blunt. His head and hide showed many scars—marks of fights and marks from numerous bullets.
One February, when I was spending a few days with a prospector, he brought home the interesting news that he had found a dead grizzly bear. The bear evidently had died while hibernating. He was found curled up in his den and frozen solid. He was old, in poor condition, and his insides were swarming with vermin. I once found a fat young grizzly, apparently healthy, who had the appearance of having frozen to death while hibernating. The time was about the middle of January. The winter to date had been extremely cold, and but little snow had fallen.
I have known of other grizzlies who met strange deaths, but, considering the fairly numerous grizzly population at the time when I was wandering the wilds, the number of bodies found is surprisingly small. One of these grizzlies had perished in a forestfire, another in a desert flood, one was killed at the foot of a cliff by a falling stone, and another was crushed in a snow-slide. Just how or where most old grizzlies come to an end, or what becomes of their bones, I have never been able to learn. It may be that many of them die in the winter dens, which cave in and bury the remains. In closing his adventurous career the grizzly appears to conceal the trail to his last resting-place.
Glancing across a beaver pond one day, I saw a big, grayish grizzly bear walk out into the grassy opening. My presence was not suspected, and I at once focused my field-glasses upon him. Here and there he went. As a grasshopper leaped into the air, the bear—big, fat, awkward, lumbering fellow that he was—leaped into the air after it. Striking the grasshopper with a fore paw, he would knock it to the ground and then pick it up with his teeth. Occasionally he advanced on all fours and slapped his paw upon the grasshopper before it leaped into the air. Once two grasshoppers flew up at the same instant. The bear stood still, located the spot where each had alighted, and then paid his respects to them in turn.
About this time another bear came into the opening within a hundred feet of the scene of activity. He was dark-gray, almost black, in color, but he too was a grizzly. After smelling here and there, the second bear dug out something; I think it must have been a nestful of mice. A minute laterin the edge of the tall grass he found a bumblebee’s nest. This he ate in its entirety. Apparently two or three of the bees escaped, to judge from the bear’s rapid defense of his nose. Occasionally, as he walked about, he ate a huge mouthful of grass, taking three or four bites at a time.
Neither of these bears paid the slightest attention to the other. Though each must have known, from both scent and sight, that the other was near, they very successfully appeared to be oblivious of the fact. A beaver pond is often a neutral feeding and swimming place.
"As hungry as a bear" is an expression of variable meaning. About one third of the year a bear has an omnivorous appetite; for another four months he lives on short rations; and during the remainder of the year he goes on a food strike and hibernates.
A bear spends most of his waking hours making a living. He has simply a devastating appetite, and as his taste runs to small stuff and dainties, he is kept on the move.
mexican grizzliesMEXICAN GRIZZLIESGroup in the Field Columbian Museum
If he denned high up the mountain-side his surroundings are likely to be mostly snow-covered when he comes forth in the spring. Under such conditions he travels miles down the mountains tofeed on the early plants already started on the low-lands. He may then slowly follow spring and summer in their steady advance up the far-reaching slopes. To a certain extent his movements are determined by the calendar. He feeds upon the best the season affords. He knows when each article of diet is in season and where in his home territory, or out of it, this abounds. In berry time look for a bear in a berry-patch. Like an enthusiastic fisherman he impatiently waits for the open season—spawning-time—and is on hand early to start fishing.
Perhaps it would be well if we could think of the grizzly as being largely vegetarian. He digs up roots; feeds on weeds, tender shoots of shrubbery, fungi, mushrooms, berries, seeds, rose-hips, pine-nuts, and acorns; and also eats bark like a rabbit and grass like a grass-eater.
The aspens were in bloom, laden with swollen buds and juicy catkins. Many birds were feasting on the catkins; and, looking over into a near-by aspen thicket, I saw a grizzly on a ledge also feeding eagerly. Reaching for a limb, first with one fore paw and then the other, he bit off a few inches and ate twigs, bark, and bloom. Occasionally he seizedthe top of an aspen with both paws, bent it down, and bit it off. It was similar to the fashion followed in eating wild plums and choke-cherries. A bear will reach up and pull down the top of a plum tree, and, biting it off, eat the small limbs, the bark, the leaves, and the fruit. A grizzly browsing in a wild raspberry-patch will bite off the tops of the vines together with the berries, the leaves, and the thorns. Sometimes the twigs and terminal buds of the pine, the fir, and the spruce are eaten.
One day I saw a grizzly approaching in a manner which indicated that he knew exactly where he was going. On arriving at an alder clump by the brook he at once began tearing off the bark and eating it. On another occasion I watched a bear strip nearly all the bark within reach from a young balsam fir. I have often seen places where bears had bitten and torn chunks of bark from aspens and cottonwoods. Though they also tear the bark from pine and spruce trees, I do not believe that this is eaten as frequently as the bark of the broad-leaved trees.
During the first few weeks after coming out of the winter den much of the grizzly’s food is likely to be of the salad order—juicy young plant stalks,watery shoots, tender bark, young grasses, buds, and leaves. In late autumn, just before hibernating, his last courses are mostly roots and nuts.
However, the normal grizzly is an omnivorous feeder, refusing only human flesh. He will eat anything that is edible—meat (fresh, stale, or carrion), wasps, yellow-jackets, grasshoppers, ants and their eggs, bugs, and grubs. Of course he eats honey and the bees. He also captures snakes, and many a rat and rabbit. He is a destroyer of many pests that afflict man, and in the realm of economic biology he should be rated high. I doubt if a dozen cats, hawks, or owls annually catch as many mice as the average grizzly.
The food of a grizzly is largely determined by locality. Along the streams of the northern Pacific Coast he lives chiefly upon fish, while the grizzlies in the Bitter Root Mountains and British Columbia generally feed upon roots and plants. Those in the Rocky Mountains of Colorado and the Southwest have a mixed diet.
The spring-beauty, the dog-tooth violet, and the shooting-star, both tops and roots, supply the grizzlies of some localities with much of their food, while in other regions they rarely, and possiblynever, touch them, though they grow abundantly. The bears in the Bitter Root Mountains eat the shooting-star freely, while the violet and the spring-beauty are favored by the bears of the Selkirks. Yet, strange though it is, the bears of both localities pay but little attention to carcasses which they find. One of the plant roots which the bears of British Columbia dig out in autumn until the ground is frozen, is a wild pea, the hedysarum.
I frequently followed a grizzly whose home territory was close to my cabin in the Rocky Mountains. Apparently he liked everything. One day he spent hours digging out mice. On another he caught a rabbit. He ate a bumblebee’s nest, and, with the nest, the grass, the bees, their young, their honey, and their stings. In a homesteader’s garden he dug out and ate nearly one hundred pounds of potatoes and turnips. The homesteader thought that a hog had been in his garden. In places I too have thought that hogs had been rooting where bears had simply been digging for roots—places with dug and upturned earth often many square yards in extent. They dig out the roots of the wild parsnip, the shooting-star, and grass, the bulbs of lilies, and sometimes the roots of willow and alder.
I endeavored to find out the kind of food preferred by two young bears that I raised. A number of times I approached them with a plate upon which were cake, meat, and honey. In my pockets I generally had also either turnips or apples. When I appeared the bears usually stood on hind legs to see what I had. If they caught the scent of apples or turnips, they thrust paws or noses into my pockets, ignoring the dainties on the plate. Otherwise they grabbed whatever happened to be nearest them on the plate.
All grizzlies appear to be fond of fish. In many places they are most successful fishermen. I watched a grizzly standing in the riffles of an Idaho stream, partly concealed by a willow clump. In half an hour he knocked five large salmon ashore. With a single lightning-like stroke of a fore paw, the fish was flung out of the water and sent flying fifteen or twenty feet. Rarely did he miss. Each of the salmon weighed several pounds.
A grizzly in the Sawtooth region, trying to catch some fish, sprawled out on a low bank by the edge of a stream. Holding himself with one fore paw, he reached over with the other and felt along the bank beneath the water. He did this very much asa fat man might. More frequently the bear makes a stand in driftwood on the bank, or on a log that has fallen into the stream, or behind a willow clump. Sometimes he captures fish by wading up a brook and seizing with claws or teeth those that conceal themselves beneath banks and projecting roots.
A huge brown grizzly mother catching trout for her two fat cubs held my attention one day. The cubs waited on the grassy bank of a brook while the mother brought them trout after trout. She sometimes caught the fish by thrusting her nose into the water beneath the bank or by reaching in with her paws. Occasionally she knocked them out of the water as they endeavored to dash past her in the riffles. The cubs watched her every move; but they were not allowed to enter the water.
Sometimes the grizzly will collect and cover over an excess of carcasses or fish. By a little mountain lake at the headwaters of the Columbia I found a pile of stale salmon beneath a number of large logs and stones. The fish had been caught during spawning-time and stored for future consumption. A day or two later I returned, and tracks showed that the bear had come back and consumed the salmon.
The grizzly eagerly earns his own living; he is not a loafer. Much work is done in digging out a cony, a woodchuck, or some other small animal from a rock-slide. In two hours’ time I have known him to move a mass of earth that must have weighed tons, leaving an excavation large enough for a private cellar. I have come upon numbers of holes from which a grizzly had removed literally tons of stone. In places these holes were five or six feet deep. Around the edges the stones were piled as though for a barricade. In some of them several soldiers could have found room and excellent shelter for ordinary defense.
When a large stone is encountered in his digging the grizzly grabs it with both fore paws, shakes and tears it loose from the earth, and hurls it aside. I have seen him toss huge stones over his shoulder and throw larger ones forward with one paw. Grizzlies show both skill and thought in nearly everything they do. They have strength, alert wits, and clever paws, and commonly work at high speed. Yet they appear deliberate in their actions and work in a painstaking, careful manner.
A grizzly I followed one day paused in a grassy space to dig out mice. In reaching them he discovered a chipmunk’s burrow. By the time he had secured all the mice and chipmunks he had torn up several square yards of sod. The place had the appearance of having been rooted up by hogs. In this fresh earth the surrounding trees sowed triumphant seeds, and here a cluster of spruces grew where grass had long held sway.
A grizzly seems never too busy or too hungry to stop and look around. “Safety First” appears to be more on his mind than eating. I have seen a grizzly pause from his earth-digging after roots to stop, look, and listen, and I have watched one stop his more than eager digging after marmots to scent the air in his scout for an enemy. And then again I have repeatedly seen him look up from his feast of smelly sirloin to make certain that he was not surprised by man.
While I was watching a flock of mountain sheep feeding down a slope just above the timber-line, a grizzly appeared on the scene. He came slowly upward from the woods. Unless the sheep or the bear changed course there must be a meeting. But the sheep continued to feed downward and the grizzly to walk up. Suddenly the bear stopped and began digging—digging evidently for a chipmunk. Astream of earth was sent flying behind him. Occasionally, too, a huge stone was sent hurtling back. This activity roused the curiosity of the sheep, and they approached within perhaps ten or twelve feet. They were lined up and eagerly watching the grizzly when he became aware of their presence. Disliking their close approach, he leaped at them with a terrific “Woof!” The sheep scattered wildly but ran only a few yards. Again uniting, they fed quietly away, and the grizzly returned to his digging.
In only exceptional cases has the grizzly been a killer of big game. In his search for food he digs out small mammals and kills rabbits and beaver. He is not likely to attempt anything as large as wild sheep, but when a grizzly forms the habit of killing big animals he is likely to make this serve as his entire food-supply. Thus a cattle-killing grizzly is likely to give his chief attention to the killing of cattle, or incidentally to that of sheep, deer, or elk. In the days of the buffalo the great herds frequently were trailed by one or more grizzlies. These, however, probably obtained most of their meat from carcasses left behind by storms, drowning, or other means of death.
The misfortunes of other animals often provide a feast for the grizzly. In going over an area just swept by a forest fire I saw two grizzlies feasting, and there were feasts for numerous others. One was wading in an abandoned beaver pond and feasting on the dead trout that floated on the surface. Two black bears, despite terrible threats from the grizzly, claimed all the fish that came within reach of the shore, but discreetly kept out of the pond. During the second day’s exploration of the burn a bear came upon me while I was eating from a fire-killed, roasted deer. When I moved on, the waiting grizzly walked up to dine.
A grizzly knows the location of every beaver pond in his territory. It is one of his favorite loafing and feeding places. Often he rolls and swims about in the water, enjoying himself immensely. Here he sometimes finds a stale fish or a dead bird brought down by the stream. Sometimes he eats a huge salad of pond-lilies.
But when beaver are gathering the harvest, especially if it is gathered at some distance from the water, he lies in wait and overhauls them. He is ready, too, to seize upon any of these unfortunate fellows who is accidentally killed or injured ingnawing down a tree. Many a time I have seen the fresh tracks of a mother and her cubs on the muddy shore of a beaver pond, and sometimes the tracks of both black bears and grizzlies.
In the course of miles of daily wandering the grizzly may occasionally come upon a wounded animal or a carcass. If his find be large, he may lie close until it is consumed; or he may make a cache of it, returning again and again until it is eaten. Grizzlies will bury an elk in the earth or cover the carcass of a cow with numbers of logs. Nothing is more common than for them to cover a carcass with refuse consisting of twigs, fallen leaves, grass, and trash. They will cover a quantity of fish with stones and logs.
A few grizzlies become cattle-killers; many grizzlies eat cattle they did not kill. On the live-stock ranges in the mountains of the West cattle die from many causes. They succumb to disease and to accidents. Winds proclaim carcass news and a feast to flesh-eaters near and far. Bears have amazingly keen noses and often are the first to enjoy the feast.
A grizzly I was following caught the scent of a carcass that was more than a mile away. He stoppedand sniffed, then changed his course and set off for the carcass. The carcass was being watched. As the grizzly was the first animal to arrive after the kill, the owner of the cow concluded that he was guilty of the killing, and accordingly proceeded to kill him and to condemn all bears as cattle-killers. Yet this cow had died from feeding too freely upon poisonous larkspur.
I was once trailing a grizzly through the snow, when he came upon the trail of a mountain lion, which he followed. Farther along the lion killed a horse. When the grizzly came upon the scene, he drove the lion off. The following day, while having a second feast off the horse, he was discovered by a rancher, who at once procured dogs and pursued and killed the “famous horse-killing grizzly.”
I have not heard of an authentic instance of a grizzly’s eating human flesh. Numbers of hunters have been killed by grizzlies, but their bodies were not eaten; they were not killed for food. Many persons have lost their lives from storms, accidents, and starvation; yet their bodies have lain for days and weeks in territory frequented by grizzlies without being eaten by them. A prospector, his horse, and his burro were killed by a falling tree.Grizzlies devoured the bodies of the animals, but that of the prospector was not disturbed. Human flesh appears to be the only thing a grizzly does not eat.
When the food of the grizzly bear becomes scarce, he goes to bed and sleeps until a reasonable supply is available, even though he waits five months for it. He feasts on the fullness of the land during the summer and wraps himself in a thick blanket of fat. When winter comes on, he digs a hole and crawls in. This layer of fat is a non-conductor of cold and in due time is drawn on for food.
One autumn day I visited the Hallett Glacier with a professor from the University of Chicago. After exploring one of the upper crevasses, we stood looking down the steep slope of the glacier. New snow had fallen a few days before, and a soft, slushy coating still overlaid the ice. The professor challenged me to coast down the steep, snow-lubricated ice-slope. We seated ourselves on this soft, slippery snow, and he gave the word “Go.” Just as we slid away, we saw at the bottom of the slope, where we were soon to be, a huge grizzly bear. I wish you might have seen our efforts as we tried to change our minds on that steep slope! The grizzlywas busily eating grasshoppers, but he heard us coming and fled at a racing gallop, giving an excellent exhibition of his clumsy hind legs reaching out flat-footed.
Each autumn numbers of insects and sometimes bushels of grasshoppers either are blown upon the ice and snow or else approach it too closely and fall from having their wings chilled. Evidently the grizzlies long ago learned of this food-supply, for the ice-fields are regularly visited by them during the autumn. Along the timber-line the grizzly feeds freely upon the last of autumn’s berries and the last green plants. Many a grizzly goes to the heights to put on fat for his long winter’s sleep.
Bear food becomes scarce as winter approaches. Fruit, berries, grass, and weeds are out of season; most birds and insects are gone. The bear feeds on what remains—small animals which he digs out, a stray stranded fish, now and then a dead bird or animal carcass, the red fruit of the rose, and the nuts, bark, and roots of trees and plants. I do not believe the grizzly eats a special or a purgative food during the few days preceding his denning up, although he may do so.
On the few occasions when I have been able tokeep track of a bear during the four or five days immediately preceding his retirement, he did not eat a single thing. I have examined a number of grizzlies that were killed while hibernating, and in every instance the stomach and intestines were empty. These facts lead me to conclude that bears rest and fast for a few days before going permanently to the winter den.
The bear generally prepares his winter quarters in advance of the time needed. He may occasionally sleep in his den before taking possession of it for the winter. But this is exceptional. In two cases that I know of he lay outside the den, though near it; and a number of other times he kept away from the den until he entered it for the long sleep. After the den is completely ready, the grizzly continues his usual search for food. Generally this requires long excursions and he may wander miles from the den.
In climbing along the bottom of a deep, narrow ravine one November day, I saw on the slope above me what appeared to be a carload or more of freshly dumped earth. My first thought was that a prospector was at work driving a tunnel; but upon examination it proved to be a recently finished butnot yet occupied hibernating-den. The entrance was about three feet in diameter. Just inside the den was a trifle larger. It extended, nearly level, about twelve feet into the mountain-side. At the back it was six feet across and four feet high.
The size of the den varies and is apparently determined by the character of the soil in which it is made and also by the inclination of the bear making it. Most other dens measured were smaller than this one.
The grizzly may use the same den for several winters or have a new one each year. He may dig the den himself or take an old one that some other bear has used, or he may make use of one shaped by Nature—a cave or a rock-slide. I knew of one grizzly hibernating in a prospector’s abandoned tunnel. Sometimes, like the black bear, he will dig a den on a steep mountain-side beneath the widely spreading roots of trees; sometimes beneath a large fallen log, close to the upturned roots which support it. In crossing the mountains one February I noticed a steamy vapor rising from a hole in the snow by the protruding roots of an overturned tree. I walked to the hole to investigate. The vapor was rank with the odor of a bear. Near my home onthe slope of Long’s Peak I have known grizzlies to den up beneath the snow-crushed, matted tree-growths at the timber-line, at an altitude of about eleven thousand feet.
Twice I have known bears to hibernate in enormous nests that were made of the long fibres of cedar bark. It must have taken days to construct one of these nests, as more than forty cedar trees had been more or less disrobed to supply material for it. It resembled the nests of trash that razor-back hogs in the South construct, though much larger. The bear, after piling it up, worked his way in near the bottom, somewhat after the fashion of a boy crawling into a haycock. Over this hibernating-nest the snow spread its blanket and probably afforded all the protection needed.
Sometimes the entrance to a den is partly closed by the occupant. Once in, he reaches out and claws the lower part full of earth, or rakes in trash and leaves. In most instances nothing is done to close the entrance. The snows drift back into the den, pile upward, and at last close the entrance most effectually.
All the dens that I recall were upon northerly or easterly—the cooler—slopes. The snow as it fellwould be likely to remain and close or blanket the entrance all winter long. Snow evidently enters into the grizzly’s winter plans.
Late one cold, snowless December I came upon a grizzly carrying spruce boughs into his den. Evidently he had used the den and found it cold. The den had a large opening; this he may have been intending to close. The rocky floor was already piled a foot deep with boughs. I have seen two other dens with floor-coverings; one of these was of pine twigs, and the other of coarse grass and kinnikinnick. But in most cases the bear sleeps upon the uncovered rocks or the naked earth.
Snow is a factor in determining when a bear begins his winter sleep. If he is fat and food is scarce, an early, heavy snow is pretty certain to cause him to turn in early. If no snow comes and food is still to be had, the bear is likely to delay his hibernation.
The individual inclination of the bear and his condition—whether fat or thin—are also factors which influence his time of retiring. I knew of two bears, apparently of similar condition, one of whom turned in three weeks earlier than the other. Two bears whom I noticed one winter ran about morethan a month after all the other bears had disappeared. Both were thin—just why I should like to know. They also turned in shortly after they became rounded out. Generally bears of a locality turn in for winter at about the same time. Hibernating may begin early in November, but in most localities, and in most years, the time is likely to be a month later.
In Alaska and the Northwest many bears hibernate in the heights above the timber-line. I have found a number in the mountains of Colorado with winter quarters at an altitude of twelve thousand feet. In southern Colorado and in the Yellowstone Park region many have denned up at about the altitude of six thousand feet. But a grizzly may hibernate anywhere in his territory where he can find or make a den to his liking.
Except when there are cubs, a grizzly dens alone. Accounts which tell of a number of full-grown grizzlies spending the winter in one den lack verification. The cubs are born in the hibernating-den, and they den up with the mother the first, and sometimes the second, winter after their birth. The cubs generally den up together the first winter after they are weaned.
Once in for the winter, the bear is likely to stay in the den for weeks. Most of the time probably is spent sleeping, and, so far as known, without either food or water. A bear may be routed out of his winter quarters without difficulty. Generally his sleep is not heavy enough greatly to deaden his senses. Hunters, trappers, floods, and snow-slides have driven grizzlies from their dens during every stage of hibernation, and in each case a moment after the bear came forth his senses were as alert as ever; he was able either to run away or to fight in his normal manner.
Prospectors in Jefferson Valley, Montana, told me of staking claims and starting to drive a tunnel early one December. A day or two after they began blasting they saw a bear break out of a snowy den and scamper away on the mountain-side. They tracked him to the place where he had holed up again. It was their belief that the noise or the jar of their shots had awakened and re-awakened the bear, until, disgusted, he left the region for a quieter sleeping-place.
A sniffling and grunting attracted my attention one midwinter day as I was snowshoeing along the side of a ravine. Presently, a short distance aheadof me, I saw a grizzly’s nose thrust out of a hole in the snowy slope. Then his head followed. Sleepily the grizzly half-opened his eyes, then closed them again. His shaking and drooping head fell lower and lower, until with a jerk he raised it only to let it droop again. He repeated this performance a number of times. Evidently it was the head of a very sleepy grizzly. Occasionally he opened his eyes for a moment, but he did not seem interested in the outside world and he finally withdrew his head and disappeared in the den.
After midwinter, and especially towards spring, a bear sometimes comes out for fresh air and exercise, or to sun himself. One gray February day, snowshoeing along the Big South Poudre, I chanced to look across an opening from the edge of the woods and saw a grizzly walking round and round in a well-beaten pathway in the snow. Occasionally he reared up, faced about, and walked round in the opposite direction. His den was near by. Half a mile farther on I came upon a bear trail near the entrance to another den. Here the bear had walked back and forth in a pathway that was about sixty feet long. It was beaten down in the snow to a depth of fifteen inches. Two places showed thatthe bear had rolled and wallowed about in the snow.
Elsewhere, another year, about the middle of March, I examined much-worn pathways near a grizzly’s den. These had been made at least three weeks before and had been used a number of times. One pathway led to the base of a cliff that faced the east, where the bear had probably lain in the morning sun. Another led to a much-used spot that caught the afternoon sun.
Perhaps a bear sometimes becomes tired or restless during his long winter sleep. Now and then he comes forth in spring with the fur worn off his hips, back, or shoulders. He may kill time, when through sleeping, with a short excursion outside the den. If the den is large, he sometimes tramples about like a caged animal.
Climatic conditions, the altitude at which the bear hibernated, and other factors determine the time when grizzlies leave their dens. Most of them come forth during March, but stragglers may not appear until late in April. Mothers with cubs remain in the den a few weeks longer than bears without cubs.
At the limits of tree growth, one cold March day, I came upon the tracks of a grizzly bear descending the mountain. I back-tracked them and found the den in which the grizzly had spent the winter. The inside of the den was gravelly and comparatively clean. Only this single line of tracks led from the den, though the weather had been clear for a week; so I judged this was the first time the grizzly had sauntered forth. It was just sundown when I reached the den. The heights were icy, and I hesitated about continuing across the Divide that night, so concluded to occupy the den. I knew that bears often take a short ramble in the spring and then return to the den, but I took the chances of sharing it with him. I do not know what the grizzly did that night—whether or not he came back. But my fire in the mouth of the den may have kept him at bay.
The hard, cracked skin on the soles of the grizzly’s feet is shed during hibernation, and the feet in spring are soft and tender. For several days he avoids traveling over rough places. His claws grow out during the winter rest, also. When he goes to sleep they are worn, broken, and blunt; but he comes out of winter quarters with claws long and moderately pointed.
What is the grizzly’s condition in the springafter months of fasting? He has hibernated from three to five months, and in this time probably has taken neither water nor food. First of all he comes forth fat and not in the least hungry. The walls of his stomach have greatly contracted, almost completely closing the interior. Two stomachs which I saw taken from grizzlies killed early in the spring were as hard as chunks of rubber, and had capacity for not more than two or three spoonfuls. But when the grizzly reappears after his long winter sleep he is as strong as ever and can run for hours or fight with normal effectiveness.
He may not eat anything for a few days after leaving the den. For many days he eats lightly, and it may be two weeks before he has a normal appetite. His first food is likely to be the early, tender shoots of plants or trees, tuberous roots, swelling buds, and green grass.
I once watched a grizzly for seven days after he emerged from his hibernating-cave. His winter quarters were near timber-line on Battle Mountain, at an altitude of nearly twelve thousand feet. The winter had been of average temperature, but with scanty snow-fall. I saw him, by chance, just as he left the den, on the first day of March. Hewalked about aimlessly for an hour or more, then returned to his sleeping-place without eating or drinking anything.
The following day he wandered about until afternoon before he broke his fast. He ate a mouthful of willow twigs and took a taste of water. He walked leisurely down the mountain and towards sundown made himself a nest at the foot of a cliff in the woods. Here he remained, apparently sleeping, until late the next afternoon. Then, just before sundown, he walked out a short distance, smelled of a number of things, licked the snow a few times, and returned to his nest.
The fourth day he went early for water and ate more willow twigs. In the afternoon he came upon a dead bird,—apparently a junco,—which he ate. After another drink he lay down at the foot of a tree for the night. The following morning he drank freely of water, surprised and devoured a rabbit, and then lay down. He slept until noon the next day, then set out foraging; he found a dead mouse and toward evening caught another rabbit. The seventh day was much like the preceding one. During the first week out the grizzly did not eat food enough to make him one ordinary meal.
Hibernation is not well understood. The habit probably originated from the scarcity of food. However, in Mexico grizzlies sometimes hibernate even though the climate be mild and food plentiful. As these grizzlies probably came from the cold north, the habit may have been fixed in the species when it arrived. Hibernation appears to be helpful and not harmful, and it may therefore continue for ages even though not required. The rest which hibernation gives to mind and stomach, with the entire organism relaxed, may both increase efficiency and lengthen life.
The polar bear has its own peculiar hibernating-habits. The food of this bear is sea food. This is available even in the winter-time, on or beneath the ice. The male polar bears do not hibernate; the females do not except when about to give birth to young. The cubs at birth are small and helpless, and require the mother’s constant care and the shelter of the den for some weeks after birth.
Mr. J. D. Figgins has written one of the best comments on hibernation that I have read. I quote as follows:—
“The period of hibernation in any mammal not only varies in a given species, but is largely influenced by the available supply of food to which it is accustomed or that is necessary for its requirements.“Examples of this character may be cited among several species of mammals. It is the custom of the chipmunks, or ‘ground squirrels,’ to hoard up at least a partial supply of food in the autumn for consumption during the winter months; but this is rarely, if ever, sufficient to keep these interesting little animals active for the entire period. In most localities, there is no available food with which to augment their scant store and they are never in evidence from late October to April. In other locations where the fruit of the Cratægus, or ‘thorn apple,’ is to be had, they may be seen almost daily, although the ground may be covered with several feet of snow and low temperatures prevail.“Another example is the opossum. Ordinarily these animals are active throughout the entire year, but towards the northern edge of their range they frequently hibernate for considerable periods (thirty-one days from personal observations).“Certain of the small rodents can, and probably do, hoard sufficient food for actual need during thewinter months; but the problem is in direct ratio to the size of the animal. Hence we find the marmot, a much larger animal, making no provision, although his habitat is confined to the higher altitudes and his period of hibernation is extended over a greater length of time than many other species. His food consists wholly of grass and other green plants, and it is doubtful if he could subsist on dry food. Granting that he could, the amount required would be prohibitive, otherwise he would make some effort in that direction, as do the conies, a much smaller animal.“Being omnivorous and of great size, a bear could not secure or preserve the necessary amount of food to carry him through five months. Such food could not consist of any variety other than vegetation, and he is not a ‘hay’ eater, and so, nature has provided him a means of surviving the long period of fasting and probably, without discomfort.“It is well known that bears show a distinct preference for fruit during the late summer and autumn months. Not because that is the season for the various fruits, but through a need of their sugar content and its fattening qualities. Composed largely of juices which are quickly absorbed, the digestive process is very brief and the discarded residue is discharged at once. This may give rise to the belief that a purgative has been employed as a means of cleansing the bowels and explains the presence of unbroken berries in the excrement and the absence of offensive odors. As a means of exploding the purgative theory we need only refer to bears in captivity. Although the latter may be confined to cement floors and have no access to any matter whatever, other than the food regularly supplied, they frequently hibernate in a quite orderly manner.“It must be conceded that bears are irregular in the period of ‘holing up’ and that they do so only when food has become too scarce to sustain activities without a drain upon the store of fat they have acquired; or during very severe weather. In the mean time there has been a gradual reduction in food as the period of hibernation approaches and a consequent lessened activity of the bowels. Nor is there reason for surprise because of the absence of excrement in the burrow and the presence of matter in the rectum when the bear emerges in the spring.“In captivity bears may, or may not, hibernate. As a rule they ‘sleep’ for more or less varying periods during severe weather. One authority states the grizzly has been known to sleep from sixty to seventy-five days and during that time it was not difficult to awaken him. Black bears frequently pass the winter without evidence of even drowsiness. Others awake at irregular intervals, and after feeding lightly, return to their slumber.”
“The period of hibernation in any mammal not only varies in a given species, but is largely influenced by the available supply of food to which it is accustomed or that is necessary for its requirements.
“Examples of this character may be cited among several species of mammals. It is the custom of the chipmunks, or ‘ground squirrels,’ to hoard up at least a partial supply of food in the autumn for consumption during the winter months; but this is rarely, if ever, sufficient to keep these interesting little animals active for the entire period. In most localities, there is no available food with which to augment their scant store and they are never in evidence from late October to April. In other locations where the fruit of the Cratægus, or ‘thorn apple,’ is to be had, they may be seen almost daily, although the ground may be covered with several feet of snow and low temperatures prevail.
“Another example is the opossum. Ordinarily these animals are active throughout the entire year, but towards the northern edge of their range they frequently hibernate for considerable periods (thirty-one days from personal observations).
“Certain of the small rodents can, and probably do, hoard sufficient food for actual need during thewinter months; but the problem is in direct ratio to the size of the animal. Hence we find the marmot, a much larger animal, making no provision, although his habitat is confined to the higher altitudes and his period of hibernation is extended over a greater length of time than many other species. His food consists wholly of grass and other green plants, and it is doubtful if he could subsist on dry food. Granting that he could, the amount required would be prohibitive, otherwise he would make some effort in that direction, as do the conies, a much smaller animal.
“Being omnivorous and of great size, a bear could not secure or preserve the necessary amount of food to carry him through five months. Such food could not consist of any variety other than vegetation, and he is not a ‘hay’ eater, and so, nature has provided him a means of surviving the long period of fasting and probably, without discomfort.
“It is well known that bears show a distinct preference for fruit during the late summer and autumn months. Not because that is the season for the various fruits, but through a need of their sugar content and its fattening qualities. Composed largely of juices which are quickly absorbed, the digestive process is very brief and the discarded residue is discharged at once. This may give rise to the belief that a purgative has been employed as a means of cleansing the bowels and explains the presence of unbroken berries in the excrement and the absence of offensive odors. As a means of exploding the purgative theory we need only refer to bears in captivity. Although the latter may be confined to cement floors and have no access to any matter whatever, other than the food regularly supplied, they frequently hibernate in a quite orderly manner.
“It must be conceded that bears are irregular in the period of ‘holing up’ and that they do so only when food has become too scarce to sustain activities without a drain upon the store of fat they have acquired; or during very severe weather. In the mean time there has been a gradual reduction in food as the period of hibernation approaches and a consequent lessened activity of the bowels. Nor is there reason for surprise because of the absence of excrement in the burrow and the presence of matter in the rectum when the bear emerges in the spring.
“In captivity bears may, or may not, hibernate. As a rule they ‘sleep’ for more or less varying periods during severe weather. One authority states the grizzly has been known to sleep from sixty to seventy-five days and during that time it was not difficult to awaken him. Black bears frequently pass the winter without evidence of even drowsiness. Others awake at irregular intervals, and after feeding lightly, return to their slumber.”
The winter life of many animals is stern and strange. During the autumn the beaver stores up a food-supply for use when the pond is closed over with ice. The cony harvests hay for his winter food. Numbers of animals hunt food each day in the snow. But the woodchuck and the bear hibernate, that is, they fast and sleep in a den during the winter.
On the slope of Long’s Peak one June morning I came upon two tiny grizzly bear cubs. Each was about the size of a cottontail rabbit—a lively little ball of fur, dark gray, almost black, in color.
Knowing that their mother had recently been killed, I thought I would capture them and bring them up properly. But they did not want to be brought up properly! We had a lively chase, dodging among the bowlders and trees. Cornering them at last among the fallen logs, I grabbed one. He did the same to me. His teeth were as sharp as needles and almost as sharp were his lively claws. It was some time before I could tear myself loose. He kept a mouthful of my trousers. At last I deposited the fighting little fellow in the bottom of a sack. The other cub scratched and chewed me up and tore my clothes; but I forced it also into the sack. Two grizzly bears in the same sack! any one should have known better!
I started to conduct them personally to mycabin, two miles away. In descending a steep moraine with the sack over my shoulder I slipped and shook the sack more than any sack should have been shaken that contained two bears. Of course, they started to fight. One bit through the sack and bit the wrong bear. I finally reached my cabin with a long pole over my shoulder. Tied to the south end of the pole was a sack full of grizzly bears.
I shook the cubs out of the sack in front of a basin of milk and thrust their faces deeply into it. Not having eaten for three days, they were “as hungry as bears” and needed no explanation concerning the milk. They had eager, cunning little faces, and were pets before sundown. In twenty-four hours Jenny knew that her name was Jenny, and Johnny that his was Johnny. After a few days they followed me about with fondness and loyalty.