Pteropodidae Author Don E. Wilson Author Russell A. Mittermeier text 2019 2019-10-31 Lynx Edicions Barcelona Handbook of the Mammals of the World – Volume 9 Bats 16 162 book chapter 88683 10.5281/zenodo.6448815 bbbf94d9-a910-4cda-97df-7eca124163ed 978-84-16728-19-0 6448815 88. Biak Naked-backed Fruit Bat Dobsonia emersa French: Roussette de Biak / German: Biak-Nacktrlickenflughund / Spanish: Dobsonia de Biak Other common names: Biak Bare-backed Fruit Bat Taxonomy. Dobsonia emersa Bergmans & Sarbini, 1985 , Sorido, Biak Island, Papua Province , Indonesia . Populations attributed to D. emersa from Numfor Island possibly represent an undescribed subspecies or species but conservatively that population is included here. Monotypic. Distribution. Schouten Is (Numfor, Biak-Supiori, and Owi) off NW New Guinea . Descriptive notes. Head-body 158- 170 mm , tail 24-27 mm ; ear 25- 23 mm , forearm 112-119 mm ; weight 178-218 ¢. Dorsal fur 1s brownish black; ventral fur is pale brown. Wings meet along spine, with underlying brown fur. Flight membranes are blackish brown. Index claw (second digit of wing) is absent. Nostrils are slightly tubular, and each flares outward from centerline. Eyes are large, with brown irises. Short tail is free of narrow uropatagium that run along legs to short stiff calcars. Habitat. Primary and secondary lowland tropical moist forests and village gardens, only reported from sea level up to ¢. 30 m . Food and Feeding. The Biak Naked-backed Fruit Batis frugivorous. It likely feeds on native figs. In village gardens,it eats carambola or star fruit ( Oxalidaceae ). Breeding. Non-volant young Biak Naked-backed Fruit Bats weighing 30-98 g have been observed in late September on Numfor, suggesting parturition in August to early September. Activity patterns. Biak Naked-backed Fruit Bats are nocturnal and roost in caves. Movements, Home range and Social organization. Biak Naked-backed Fruit Bats are gregarious In cave roosts. Status and Conservation. Classified as Vulnerable on The IUCN Red List. The Biak Naked-backed Fruit Bat is known from less than five locations. There is some disturbance at roost sites and limited hunting. It might be threatened by habitat degradation and forest clearing due to logging and agricultural expansion on Biak, the most highly populated West Papuan island, but it appears to tolerate some disturbance. Bibliography. Bergmans & Sarbini (1985), Bonaccorso & Helgen (2008a), Flannery (1995a).