Also known as the Bent-winged bat, the Schreibers’ bat (Miniopterus schreibersii) weighs 11-19g with an average wingspan of 25-30cm. It is almost exclusively a cave dwelling species, hence it’s Spanish name, Murciélago de cueva. The Schreibers’ bat is listed as Near Threatened in the IUCN Red List of species and considered Vulnerable in Iberia and Endangered in Gibraltar. It can form enormous colonies of tens of thousands in Spain and Portugal. This bat was once abundant in Gibraltar with local colonies numbering in the thousands. However, the Schreibers’ bat population in Gibraltar has sadly suffered a sharp decline of 97.86% since the 1970s with only one colony of a couple of hundred bats remaining.
The Schreibers’ bat has grey-brown to dark grey fur with some individuals displaying paler yellowish brown fur and echolocates at a peak frequency of 53 kHz.