Most of these animals die by autumn, however, and spring density is only 2-3 per ha. Individuals spend most of their time in a home range of two to three hectares but may shift their range several times during a summer. In some areas, reproduction continues from February to October, and up to three litters may be produced by each female, but mating usually does not begin until March. There is generally an intensive breeding peak from March to May and a lesser peak from July to August. The gestation period is 25-30 days.
Litters contain one to eight young, the average being about three or four.