The forearm is 51 mm (2.0 in) long, and the hind foot is 11.6–11.8 mm (0.46–0.46 in) long.It has long, silky hair on its back, with individual hairs 8 mm (0.31 in) long.Hairs on its belly are shorter, at 6 mm (0.24 in) long.It can be distinguished from the closely related serotine bat by its yellowish brown fur, which is much lighter than that of the serotine bat.The internal margin of the ear is convex; ears are rounded at the tip.The tragus is blunt at the tip.The feet are large with brown claws and hairy toes.
It has been documented in Spain, Portugal, Gibraltar, Morocco, Algeria, Tunisia, and Libya.It has not been documented at elevations over 1,800 m (5,900 ft).During the day, it will roost in rock crevices, bridges, and buildings.It is tolerant of a wide range of climates and habitats, including semi-desert, temperate forest, shrubland, suburbs, and subtropical dry forest.It prefers to forage over open habitats such as pastures and gardens.
It is insectivorous, feeding on beetles, moths, and flies.In particular, important prey items include scarab beetles and various flies.Females will form maternity colonies, consisting of 20-100 individuals.
It is currently evaluated as least concern by the IUCN.It meets the criteria for this listing because it is abundant in population and widespread geographically.There is no reason to believe that its population is declining drastically.In some areas of southern Spain, it is considered one of the most common species of bat.