the only indigenous mammals of bermuda are five species of bats. all of these bats are also in the eastern united states — "lasionycteris noctivagans", "lasiurus borealis", "lasiurus cinereus", "lasiurus seminolus" and "perimyotis subflavus". other commonly known fauna of bermuda includes its national bird, the bermuda petrel, and the bermuda rock skink. the skink was long thought to have been the only indigenous land vertebrate of bermuda. it has recently been discovered, however, that a species of terrapin predated the arrival of humans on the archipelago.