Reproduction Little reproductive information specific to short-eared rock wallabies is available. Available reproductive information is general to all rock wallaby species. Rock wallaby females are polyestrous, with an average estrous cycle of 30 days and a gestation period of 30 days. Rock wallabies are marsupials, they give birth to altricial young that migrate from the end of the birth canal to a pouch that houses the nipples. Young can spend anywhere from 190 to 230 days in the mother's pouch suckling.
Twins are possible but single births are most common.
Behavior As with reproduction, little specific behavioral information is available for short-eared rock wallabies. These animals are primarily nocturnal. These rocky areas are typically near forests, woodlands, or savannahs. While other species of Petrogale have been threatened by introduced species, such as feral rabbits and feral goats, Petrogale brachyotis population sizes do not seem to have declined. Negative Short-eared rock wallabies were previously thought to be agricultural pests.