The least little mastiff bat has short, dark brown to gray fur and a small white throat spot. A Cuban study recorded it roosting in palms.
Its coat is short and dense, dark brown or gray; the paper also describes a slender muzzle and a small white throat spot.
It is nocturnal and feeds on insects. At a protected site in Ciego de Ávila, the study documented roosts inside Copernicia vespertilionum palms.
An extinction-risk assessment has not been added yet.