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Little is known about reproduction in hammer-headed bats. In some populations, breeding is thought to take place semi-annually during the dry seasons. The timing of the dry season varies depending on the locality, but in general the first breeding season is from June to August and the second is from December to February.
Young Egyptian fruit bat. The Egyptian fruit bat has two breeding seasons: the first is from April to August, while the second season is from October to February. [24] When the breeding season begins, the bats within the colony separate based on sex. The males gather together to form bachelor groups while the females form maternity colonies. [3]
The greater short-nosed fruit bat is gregarious, and typically roosts in same-sex groups of eight to nine individuals. The sexes remain separate until the mating season, when group size increases. They are polygynous and 6–10 males and 10–15 females usually share palm-frond tents during the breeding season. [3]
Most flying foxes are seasonal breeders and give birth in the spring, though the Mariana fruit bat seems to have aseasonal breeding with new pups documented throughout the year. [37] Females remain fertile with no decrease in reproductive capability for at least the first 12 or 13 years of life.
Eastern red bat breeding season starts in the autumn, [12] and multiple males can sire a single litter. [13] Pups are born in the summer, [ 12 ] usually sometime between May and July. [ 14 ] Unlike other bats species who usually produce one pup, eastern red bats have on average three pups at a time, and some eastern red bats have given birth to ...
Big brown bat mating season is in the fall. After the breeding season, pregnant females separate into maternity colonies around April. [8] [32] Maternity colonies range in size from 5-700 individuals, though in the eastern US and Canada, they are frequently 25-75 adults. [29] Historically, maternity colonies were probably in tree cavities.
Breeding occurs between June and September in Arizona, New Mexico, and other parts of the US, and earlier farther south, where a second breeding season may also occur. Females give birth to single young, although up to two have been reported in Guatemala. Males and females segregate during the time of gestation and parturition.
The breeding season lasts from August to September, shortly after the bats awake from winter hibernation. However, spermatogenesis in the males occurs between October and May, with the sperm being stored in the epididymis until the start of the breeding season. [ 4 ]