A large part of our work has been focused on uncovering the ecology of Pteropus dasymallus, a fruit bat endemic to the Ryukyu archipelago (Okinawa region) in Japan. We have undertaken studies on various aspects of its ecology and were the first to unveil the long-lasting ongoing conflicts with local agriculture. This, along with other threat factors that were unaccounted for in the literature, has been taking a toll on populations of this cute paleotropical bat.


This work made the cover of the journal Mammal Biology and led the International Union for the Conservation of Nature (IUCN) to request a reassessment of Japanese fruit bats by the Island Bat Research Group.

Vincenot C.E., Collazo A.M., Russo D. The Ryukyu Flying Fox (Pteropus dasymallus) - A Review of Conservation Threats and Call for ReassessmentMammalian Biology, Volume 83, Issue 4, Pages 71–77, March 2017.

Vincenot, C. 2017. Pteropus dasymallus. The IUCN Red List of Threatened Species 2017: e.T18722A22080614.

Electronic copies of academic papers mentioned here can be provided upon request.

Study kindly supported by:


The Island Bat Research Group (IBRG) is an international multi-disciplinary unit. It has been involved for several years in the research and conservation of endangered insular bats in Japan and other island countries.


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© 2018 by Christian E. Vincenot.

Picture featured on this website were shot by members of the group, but also by close friends and collaborators. Therefore, reuse of these pictures is subject to prior approval by the IBRG to insure proper credit can be given to authors.