If it is still cold, she will return to her home underground to gestate. After a month long pregnancy, the female bears a litter of two to five offspring in her nest burrow. She nurses the young for about two months before she takes them on foraging trips. The offspring are ready to leave the nest and find their own territories after they are taught by their mother to hunt for nuts, berries, fruits, grasses, fungi, snails, and insects in a six week survival course.
They are fully grown after about 3 months and sexually mature the following year if they live that long. About half of all chipmunks in any given year are young that were born in that season. Chipmunks in the wild live, on average, just over one year.
Chipmunks are a valuable prey item for a variety of species including hawks, owls, falcons, foxes, snakes, cats and weasels.
The 25 known species of chipmunks in the world http://goo.gl/mAs2T
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