In favorable habitat, densities can approach five squirrels per acre. Females defend their home range, at least during parts of the year, and there is little or no over lap with the home range of other females. Males do not defend territory, and their home ranges often overlap with those of other males. Reproduction Southern flying squirrels show two periods of breeding activity. The first is in February and March, and the other is from late May through July.
Females can produce two litters per year but only under favorable conditions.
Litters, usually of three or four, but up to seven young, are born following a gestation period of 40 days. Newborn young are hairless with eyes and ears closed. They are tiny, weighing less than a quarter-ounce each. The gliding membrane is visible as a transparent fold of skin. The ears open at about three weeks of age, and a week later the eyes open.