Endangered Species is the fifth studio album by Japanese girl band eX-Girl. Unlike previous albums it was first released outside Japan, on Jello Biafra's Alternative Tentacles label (catalog number Virus 313). The line-up is credited as Kirilola (previously known as Kirilo), Chapple and Keikos. Zorek is only on the front cover of the album but played on the tour, after Keikos departed. Some tracks feature previous band members Fuzuki (drums). Keikos later returned to the band after Zorek departed. As usual, the album was produced by the band's mentor and collaborator, Hoppy Kamiyama.