Pale spear-nosed bats are nocturnal, spending the day roosting in hollow trees or the mouths of caves. They live in colonies of up to 400 individuals. Within each colony, individual bats cluster together in smaller groups, which are either all-male, or consist of a single breeding male and up to 15 females. The composition of these harems varies, with females moving between different groups in response to the displays of males. Resident females within a harem frequently groom one another, but are aggressive towards outsiders.