![]() ![]() Mothers catch their newborn young in a special membrane between their legs. When females give birth, they reverse their position so the head is up. Normally, bats hang with their heads pointed down. ![]() ( Fenton and Barclay, 1980 Wai-Ping and Fenton, 1988) Females give birth to only one pup each year. ( Fenton and Barclay, 1980 Schowalter, 1980)Įven though little brown bats mate in autumn, females delay ovulation and store sperm for about seven months before they actually get pregnant in spring. The first bats to arrive at the hibernaculum in late July are adult males, and females without young. Swarming helps young bats find suitable hibernation roosts. When the temperature falls during late summer and autumn, bats begin swarming at the hibernaculum. Little brown bats hibernate in a special roost called a hibernaculum. Mating is random and both males and female mate with more than one other bat. But sometimes, males mate with other bats who have already entered hibernation. Sometimes both the male and female are awake and alert when mating takes place. Mating occurs right before hibernation in the hibernaculum roost. Little brown bats mate in two different ways.
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