Chiropodomys karlkoopmani
Habitat
Tropical primary lowland forest
Range
Endemic to Pagai and Siberut, Mentawai Islands (off western Sumatra)
Koopman's pencil-tailed tree mouse is an arboreal rodent in the family Muridae, endemic to Pagai and Siberut in the Mentawai Islands off the western coast of Sumatra. Its natural habitat is tropical primary lowland forest, and it is threatened by habitat loss through logging (Wikipedia, general species account).