Pallas's free-tailed bat is a medium-sized bat recorded in several habitats in Argentina. It roosts in groups in tree hollows and buildings and eats insects.
Its fur is grayish brown to reddish brown. The ears are medium-sized and separated, the muzzle has a straight ridge, and the tail is short and thick.
It roosts in tree cavities, crevices, and buildings, sometimes in colonies of hundreds. It catches insects in flight at night.
An extinction-risk assessment has not been added yet.