THE GROUND-SQUIRREL THAT PRETENDS IT'S A CHIPMUNK
First, largest, and least common, is the Big Striped Ground-squirrel, the Golden Ground-squirrel or Say's Ground-squirrel, called scientifically Citellus lateralis cinerascens. This, in spite of its livery, is not a Chipmunk at all but a Ground-squirrel that is trying hard to be a Chipmunk. And it makes a good showing so far as manners, coat and stripes are concerned, but the incontrovertible evidence of its inner life, as indicated by skull and makeup, tells us plainly that it is merely a Ground-squirrel, a first cousin to the ignoble Picket-pin.
I found it especially common in the higher parts of the Park. It is really a mountain species, at home chiefly among the rocks, yet is very ready to take up its abode under buildings. At the Lake Hotel I saw a number of them that lived around the back door, and were almost tamed through the long protection there given them. Like most of these small rodents, they are supposed to be grain-eaters but they really are omnivorous, and quite ready to eat flesh and eggs, as well as seeds and fruit. Warren in his "Mammals of Colorado," tells of having seen one of these Ground-squirrels kill some young Bluebirds; and adds another instance of flesh-eating observed in the Yellowstone Park, where he and two friends, riding along one of the roads, saw a Say Ground-squirrel demurely squatting on a log, holding in its arms a tiny young Meadow Mouse, from which it picked the flesh as one might pick corn from a cob. Meadow Mice are generally considered a nuisance, and the one devoured probably was of a cantankerous disposition; but just the same it gives one an unpleasant sensation to think of this elegant little creature, in appearance, innocence personified, wearing all the insignia of a grain-eater, yet ruthlessly indulging in such a bloody and cannibal feast.
A FOUR-LEGGED BIRD—THE NORTHERN CHIPMUNK
The early naturalists who first made the acquaintance of the Eastern Ground-squirrel named it Tamias or "The Steward." Later the Northern Chipmunk was discovered and it was found to be more of a Chipmunk than its Eastern cousin. The new one had all the specialties of the old kind, but in a higher degree. So they named this one Eutamias, which means "good" or "extra good" Chipmunk. And extra good this exquisite little creature surely is in all that goes to make a charming, graceful, birdy, pert and vivacious four-foot. In everything but colours it is Eutamias or Tamias of a more intensified type. Its tail is long in proportion and carried differently, being commonly held straight up, so that the general impression one gets is of a huge tail with a tiny striped animal attached to its lower end.
Its excessive numbers along the roads in the Park are due to two things: First, the food, for oats are continually spilled from the freighting wagons. Second, the protection of piles of pine trees cut and cast aside in clearing the roadway.
There is one habit of the Eastern Chipmunk that I have not noted in the mountain species, and that is the habit of song. In the early spring and late autumn when the days are bright and invigorating, the Eastern Chipmunk will mount some log, stump or other perch and express his exuberant joy in a song which is a rapid repetition of a bird-like note suggested by "Chuck," "Chuck," or "Chock," "Chock." This is kept up two or three minutes without interruption, and is one of those delightful woodland songs whose charm comes rather from association than from its inherent music.
If our Western Chipmunk is as far ahead in matters musical as he is in form and other habits, I shall expect him to render no less than the song of a nightingale when he gives himself up to express his wild exuberance in a chant.
I shall never forget the days I spent with a naturalist friend in an old mill building in western Manitoba. It was in a pine woods which was peopled with these little Chipmunks. They had hailed the mill and its wood piles, and especially the stables, with their squandered oats, as the very gifts of a beneficient Providence for their use and benefit. They had concentrated on the mill; they were there in hundreds, almost thousands, and whenever one looked across the yard in sunny hours one could see a dozen or more together.