The white-bellied sheath-tailed bat has a glossy black back and a white-to-yellow belly. It catches insects while flying high and fast, and roosts in tree hollows or abandoned nests of other animals.
It reaches up to about 87 mm in body length, with long, narrow wings, a glossy black back, and a white-to-yellow belly extending to the shoulders and behind the ears. The head is flattened with a sharply pointed muzzle. Males have a throat pouch; females have bare skin at the same site.
It flies high and fast over forest canopies and lower over open country while hunting insects. It roosts in old tree hollows and sometimes in abandoned sugar-glider nests. The NSW profile records a single young from December to mid-March.
An extinction-risk assessment has not been added yet.