High Quality Content by WIKIPEDIA articles! The Pacific Sheath-tailed Bat or Polynesian Sheath-tailed Bat (Emballonura semicaudata) is a species of sac-winged bat in the family Emballonuridae. It is found in American Samoa, Fiji, Guam, Micronesia, Palau, Samoa, Tonga, and Vanuatu. Its natural habitat is caves. It is threatened by habitat loss.