The Christmas Island pipistrelle (Pipistrellus murrayi) is a species of vesper bat found only on Christmas Island, Australia. It is a small bat weighing around 3 to 4.5 grams. This species feeds on insects and roosts in tree hollows and decaying vegetation. It has sometimes been considered synonymous with Pipistrellus tenuis; however, revisions of the genus based on baculum have identified Pipistrellus murrayi as a distinct species. This is supported by genetic work conducted for the Australian Government as part of its investigation into the decline of Christmas Island ecology and the pipistrelle in mid-2009; the results of this analysis indicate that the Christmas Island Pipistrelle is closely related to but distinct from other Asian pipistrelles.Grave fears are held that the species ma