 In 1992 a species of bat, Bulmer's fruit bat ("Aproteles bulmerae") previously thought extinct was discovered to still live in Luplupwintem Cave, an enormous cave above the Hindenburg Wall in their territory.This bat was first discovered in the 1970s by David Hyndman, who studied the Wopkaimin.However the contemporaneous introduction of the shotgun was thought to have resulted in the extinction of the species.