One March at the close of a wet snow-fall I went out into a near-by pine grove to see the squirrels. One descended from a high hole to the snow and without trouble located and bored down through the snow to his cone-deposit. With difficulty he climbed up through the heavy snow with a cone. He did not enjoy floundering through the clinging snow to the tree-trunk. But at last up he started with a snow-laden cone, in search of a dry seat on which to eat. After climbing a few feet he tumbled back into the unpleasant snow. In some manner the wet snow on the tree-trunk had caused his downfall. With temper peppery he gathered himself up, and for a moment glared at me as though about to blame me for his troubles. Then, muttering, he climbed up the tree. Sometimes the chipmunk, and the squirrel also, indulge in hibernating periods of sleep despite their ample stores of convenient food.
The ptarmigan is preëminently the bird of the snows; it is the Eskimo of the bird world. It resides in the land realm of the Farthest North and also throughout the West upon high mountain-tops. In the heights it lives above the limits of tree growth, close to snow-drifts that never melt, and in places above the altitude of twelve thousand feet. It is a permanent resident of the heights, and apparently only starvation will drive it to the lowlands. Its winter food consists of seeds of alpine plants and the buds of dwarf arctic willow. This willow is matted, dwarfed, and low-growing. When drifted over, the ptarmigan burrow into the snow and find shelter beneath its flattened growth. Here they are in reach of willow buds.
Buds are freely eaten by many kinds of birds; they are the staff of life of the ptarmigan and often of the grouse. They are sought by rabbits and go in with the browse eaten by big game. Buds of trees and shrubs are a kind of fruit, a concentrated food, much of the nature of nuts or tubers.
The cheerful water-ouzel, even during the winter, obtains much of its food from the bottom of brooks and lakes. The ouzel spends many winter nights in nooks and niches in the bank between the ice and the water. This is a strange place, though one comparatively safe and sheltered. In getting into the water beneath the ice, the ouzel commonly finds opportunity at the outlet or the inlet of the lake; sometimes through an opening maintained by spring water. There are usually many entrances into the waters of a frozen brook,—openings by cascades and the holes that commonly remain in the ice over swift waters. Excessive snow or extreme cold may close all entrances and thus exclude the ouzel from both food and water. Down the mountain or southward the ouzel then goes.
Woodpeckers and chickadees fare well despite any combination of extreme cold or deep snow. For the most part their food is the larvæ or the eggs that are deposited here and there in the tree by hundreds of kinds of insects and parasites which afflict trees. Nothing except a heavy sleet appears to make these food-deposits inaccessible.
Most birds spend the winter months in the South. But bad conditions may cause resident birds and animals to migrate, even in midwinter. Extremely unfavorable winters in British Columbia will cause many birds that regularly winter in that country to travel one or two thousand miles southward into the mountains of Colorado. Among the species which thus modify their habits are the red crossbill, the redpoll, the Lapland longspur, and the snowy owl.
After all, there are points in common between the animal life of the wild and the human life of civilization. Man and the wild animals alike find their chief occupation in getting food or in keeping out of danger. Change plays a large part in the life of each, and abnormal conditions affect them both. Let a great snow come in early winter, and both will have trouble, and both for a time may find the struggle for existence severe.
The primitive man slaughtered storm-bound animals, but civilized man rescues them. A deep snow offers a good opportunity for more intimate acquaintance with our wild neighbors. And snowy times, too, are good picture-taking periods. In snowy times, if our wild neighbors already respect us, tempting food and encouraging hunger will place big, shy, and awkward country fellows and nervous birds close to the camera and close to our hearts.