Part 6

On Mount Rainier the whistler is abundant in the rock slides from about 5,000 feet to forest line and above. Occasionally the alpine parks and meadows are chosen habitats; the animals are common in the Paradise Valley and on the open slopes above Alta Vista.

A piercing, far-carrying whistle is often the park visitor’s introduction to the marmot or rockchuck of Mount Rainier. A careful scrutiny of the nearby terrain will often be rewarded by the sight of one or several of these animals, old and young, perched on a rock above the entrance to the burrow, or galloping clumsily but swiftly toward home and safety.

It is usually possible to continue the acquaintance at closer range, particularly if the observer approaches slowly and the animals are in areas where they have become accustomed to having human visitors in their neighborhood.

The whistler is almost strictly vegetarian in his food habits, feeding upon green succulent vegetation in the near vicinity of the burrow. It is common to find well-beaten paths from the animal’s “front door” to the forage areas. Moving about on a grassy slope the fat, lazy rodent seems anything but alert, as he crawls from one spot to another. But the observer soon becomes aware that the chuck’s pauses to survey the landscape are frequent; his head is raised, if no danger threatens his tail flips and feeding is resumed. If frightened, swift retreat is generally preceded by the shrill whistle, and the sluggish, crawling fat one becomes a scurrying bundle of fur following a well-worn and familiar route to the sanctuary of his den.

The marmot is a sun-worshiper. After an early morning feeding period, it is his custom to sprawl, rug-like, on a favorite rock slab, sometimes for hours, resting and obviously enjoying his sun-bath. Chucks are rarely abroad for any extended length of time on cloudy, drizzly days. They may appear if driven out by hunger, but seem to prefer the warmth and comfort of the den during inclement weather.

The hibernating period of the marmot begins in September and lasts well into spring, the time of emergence is usually late in April. There is no evidence that any food is stored, and for some time after coming out of hibernation the animals may travel a considerable distance over the snowfields in search of open ground and green vegetation.

The famous naturalist, Ernest Thompson Seton, has well expressed the marmot’s way of life:

“Convincing evidence there is that, during lethargy—the little death of the winter sleep—the vital functions are suspended—the sleeper neither grows, suffers, wastes, nor ages. He did not lay up stores of food; yet, in the spring, he comes out just as fat as he went in the fall before.

“If then, the Powers-that-Be have allotted to the Marmot five full years of life, and he elects to live that life in ten bright summer times, then must he spend the six dark months each year in deathlike sleep. And this he does, in calm, deliberate choice.

“Oh, happy Whistler of the Peaks! How many of us would do the very same, were we but given choice.”

Not many natural enemies threaten the marmot. Perhaps the most to be feared is the golden eagle, which may drop from the blue to seize him in the midst of his luxurious sun-bath. Because of his size the smaller predators are harmless to him, but the coyotes and foxes are relentless hunters and ever-present dangers.

THE CHIPMUNKS

Two kinds of chipmunks, the Cooper and Hollister, are known to occur within the park. Although their altitudinal ranges overlap, the two species may be quite readily distinguished by their variation in size and other characteristics. A brief discussion of each follows:

The Cooper chipmunk, Tamias townsendii cooperi Baird, is the larger of the two species mentioned above. It is predominantly dark brown in color; the light colored stripes above and below the eye are indistinct; the black head stripes are not conspicuous; the nine alternating black and grayish white lengthwise stripes on the back are somewhat obscured by the dark color; the tail is black above, grizzled with white, silvery margined, reddish brown below. The total length of a typical specimen is ten inches; head and body, five and one-half inches, tail four and one-half inches.

This chipmunk is found in the higher eastern Cascade Mountains and Olympic Mountains of Washington. In Mount Rainier National Park it occurs from park boundaries to 6,000 feet, almost to forest line.

The Hollister chipmunk, Tamias amoenus ludibundus (Hollister), also called the little chipmunk or Alpine chipmunk, is about a third smaller in size than the Cooper chipmunk. It is predominantly gray brown in color. The light colored stripes above and below the eye are distinct; the black head stripes are more conspicuous than those of the Cooper, the back stripes are sharply defined; the tail is brown mixed with black above, margined with yellowish brown, yellowish brown below. The total length is about eight and three-fourths inches; head and body four and three-fourths inches, tail four inches.

The Hollister chipmunk is found in the higher Cascade Mountains of Washington. In Mount Rainier National Park it occurs generally in the Hudsonian Zone between 4,500 and 6,500 feet, rarely lower or above forest line, but it is one of the few park animals recorded on the summit of Mount Rainier.

Specimens in park collection: Cooper chipmunk, RNP-7, RNP-8, RNP-9, RNP-16, RNP-18, RNP-74, RNP-110; Hollister chipmunk, RNP-28, RNP-29, RNP-30, RNP-95; Longmire Museum, Park Headquarters.

The lively, audacious, and beautifully marked chipmunks are the most popular of all the animals of the park. Locally abundant as they are in the neighborhood of the campgrounds and lodges, easily observed because of their diurnal habits and lack of fear, they are a source of entertainment and amusement to many park visitors.

Like the mantled ground squirrels, the chipmunks adapt themselves rapidly to man’s presence, forage about camps and lodges in search of various delicacies, invade camp stores without hesitation, but are such engaging company that it is difficult to regard them as anything other than friendly guests.

Many varieties of seeds and berries furnish the food supply of this animal, and quantities are stored in their burrows for use during the spring and early summer. Although the chipmunks hibernate during most of the winter, they sometimes venture out on warm, spring-like days, returning to their winter nests when the weather again becomes inclement.

Predaceous birds and mammals active during the daylight hours are all enemies of the chipmunks. These natural enemies work to keep the chipmunk populations free of contagious diseases such as relapsing fever, which is transmissible to human beings, by removing sick and sluggish chipmunks before they can infect their companions.

CASCADE MANTLED GROUND SQUIRREL, BIG CHIPMUNK Citellus saturatus (Rhoads)

As the name implies, the mantled ground squirrels are ground dwellers. In general external appearance they resemble the eastern chipmunks, but are considerably larger, and much bigger than their environmental associates, the western chipmunks. They may be further distinguished from the latter species by the more robust body, the conspicuous white eye-ring, and the absence of stripes on the head. The Cascade species of mantled ground squirrel is about twelve inches in length overall, with a flattened, somewhat bushy, narrow tail some four inches long. The sexes are colored alike, the mantle over the head, sides of the neck, shoulders, and forearms is reddish-brown, mixed with black, which is in distinct contrast to the rest of the upper parts. The back is grizzled black, merging into grizzled red-brown over the rump, with a narrow yellowish-white stripe, edged with black, on each flank from shoulder to thigh. The underparts and the upper surfaces of the feet are yellowish-white. The tail is well-clothed with dark, yellow-tipped hair above, yellowish-brown below.

Specimens in park collection: RNP-33, RNP-34, RNP-36; Longmire Museum, Park Headquarters.

The mantled ground squirrels are found only in western North America, on the forested mountain slopes from California, Arizona, and New Mexico north into British Columbia.

The species common to Mount Rainier National Park is found in the Cascade Mountains of Washington, and on the Mountain it is confined principally to the Hudsonian zone, between 4,500 and 6,500 feet. It is most abundant on the east side, but is very common locally in the Paradise Valley vicinity.

This animal inhabits by preference the rather open, rocky hillsides, and is seldom seen in the heavily forested sections. Burned over brush lands are favored localities, particularly on those slopes exposed to the sun.