Eastern chipmunks mate twice a year, first during early spring and again during the summer or early fall. Two to five young are born in April to May and again in August to October. Adults may live up to three years. Chipmunks are omnivores. Their diet consists primarily of grains, nuts, berries, seeds, mushrooms, insects, and salamanders.
Chipmunks also prey on young birds and their eggs.
They hoard food for the winter by carrying it in special cheek pouches. A valuable forest inhabitant, chipmunks move seeds around for tree regeneration, and they are an important food source for birds and other mammals. Damage and Damage Identification Chipmunks may consume flower bulbs, fruits, seeds, and seedlings. When present in large numbers, they can also cause structural damage by burrowing under patios, stairs, retention walls, or foundations. Most often chipmunks are simply a nuisance problem.