Post 23708
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I do not know just when the mother returns to her old home. Possibly the new home is closely connected with the one she has temporarily left, and it may be that during the autumn or the early spring she digs a short tunnel which unites them. The manner of this aside, I can say that each summer the mother that I watched, on retiring from the youngsters, carried supplies into a hole which she had not used before, and the following spring the youngsters came forth from the same hole, and presumably from the same quarters, that the children of preceding years had used.
Chipmunks feed upon a variety of plants. The leaves, seeds, and roots are eaten. During bloom time they feast upon wild flowers. Often they make a dainty meal off the blossoms of the fringed blue gentian, the mariposa lily, and the harebell. Commonly, in gathering flowers, the chipmunk stands erect on hind feet, reaches up with one or both hands, bends down the stalk, leisurely eats the blossoms, and then pulls down another. The big chipmunk, however, has some gross food habits. I have seen him eating mice, and he often catches grasshoppers and flies. It is possible that he may rob birds’ nests, but this is not common and I have never seen him do so. However, the bluebirds, robins, and red-winged blackbirds near me resent his close approach. A chipmunk which has unwittingly climbed into a tree or traveled into a territory close to the nest of one of these birds receives a beating from the wings of the birds and many stabs from their bills before he can retreat to a peaceful zone. Many times I have seen birds battering him, sometimes repeatedly knocking him heels over head, while he, frightened and chattering, was doing his best to escape.
There are five species of chipmunks in Colorado. Two of these are near me,–the big chipmunk and the busy chipmunk. The latter is much smaller, shyer, and more lively than the former and spends a part of its time in the treetops; while the big, although it sometimes climbs, commonly keeps close to the earth.