Eastern Chipmunks breed twice a year, typically in March/April and in June/July. After mating, the female chipmunk outfits a central nesting chamber deep within the ground with leaves. She will give birth to four to six young in about a month. When born the young are about the size of a jelly bean, toothless and furless with closed eyes and ears. The mother raises her young by herself and by the time they are a month old, they begin to emerge from their burrow. At this point they are about two-thirds the size of an adult chipmunk. (Photo: female Eastern Chipmunk collecting leaves for her underground nest)
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