Antioquian sac-winged bat

The Antioquian sac-winged bat (Saccopteryx antioquensis) is a bat of the family Emballonuridae known from Colombia. Its species name refers to the Colombian department of Antioquia, where the only two individuals ever recorded were found, both adult males, in eastern Antioquia in 1996: one on the wall of a church in the municipality of Sonsón in March, and one near San Luis, close to a karst formation, in April. It is medium-sized for its genus, with a forearm of 36.2 to 38 millimetres and a body length of 50 to 54 millimetres. It lacks the white dorsal lines of its relatives, and its thick, woolly coat is dark brown above with uniformly coloured hairs, lighter below where the hair tips turn yellowish, while the face is hairless. Its diet has not been studied, although other bats of its genus are aerial insectivores. The IUCN first rated it data deficient in 2008 and reassessed it as endangered in 2016. Its habitat is unprotected and agricultural expansion could threaten it. Surveys from 2006 to 2016 found none, and it has not been seen since 1996.