Males may roost separately or in the nursery colony. Prefers rocky outcrops, cliffs, and crevices with access to open habitats for foraging. Undergoes shallow torpor daily. There is a post-breeding season dispersal. Capable of homing from distances of a few miles, but not further.
Group size is important for metabolic economy and growth of young.
Young animals occupy the center of clusters. Fertilization is delayed, gestation is 53-71 days. The average litter is 2, but females reproducing for the first time usually have 1 young. Litter size is 1-3. The altricial young are weaned in 7 wk, and are observed flying in July and August.