Family: Vespertilionidae

Scientific name: Pipistrellus abramus

Common name: Japanese pipistrelle

IUCN status: Least Concern (LC)

MSJ Red list status: C-2 & K for the Okinawa Prefecture population


General morphology: The fur is not dense; color varies but in general the upper surface is grayish olive, slightly frosty; undersurface is light greyish brown; wings are rather narrow (Yoshiyuki, 1989).


Diet: Feeds mainly on Lepidoptera, Diptera, Hymenoptera and Hemiptera (Funakoshi & Uchida, 1978; Hirai & Kimura, 2004). Diet composition varies seasonally (Funakoshi & Uchida, 1978; Hirai & Kimura, 2004).


Habitat: Roosts have been found in various narrow spaces of buildings and in the spaces of bridges (Yasui et al., 1997). A few reports are from caves and in nests of the red-rumped swallow (Hirundo daurica) (Yoshiyuki, 1989). Roosts are not changed frequently (Morii, 2001).


Echolocation calls: FM-QCF call structure; FMaxE=43.4 kHz (Hokkaido), FMaxE=42.9 kHz (Kanagawa Prefecture) (Fukui et al., 2003)



Funakoshi, K., & Uchida, T. (1978). Studies on the physiological and ecological adaptation of temperate insectivorous bats: III. Annual activity of the Japanese house-dwelling bat, Pipistrellus abramus. Journal of the Faculty of Agriculture, Kyushu University, 23, 95-115. 

Morii, T. (1982). Seasonal changes of emergence time in the Japanese house bat, Pipistrellus abramus, from 1974 to 1980 in Kan-oji City, Kagawa Prefecture, Japan. Bulletin of the Biological Society of Kagawa, 10, 97-104. 

Yoshiyuki, M. (1989). A systematic study of the Japanese Chiroptera. 242pp. National Science Museum: Tokyo.

Yasui, S., Maruyama, N., & Kanzaki, N. (1997). Roost site selection and colony size of the common Japanese pipistrelle (Pipistrellus abramus) in Fuchu, Tokyo. Wildlife Conservation Japan, 2(2), 51-59.

Morii, T. (2001). Seasonal changes of emergence number, sex ratio and age composition in the same colony of Pipistrellus abramus in Kagawa Prefecture, Japan. Bulletin of the Biological Society of Kagawa, 28, 37-44.

Fukui, D., Maeda, K., Sato, M., & Kawai, K. (2003). New record of the Japanese house dwelling bat, Pipistrellus abramus from Hokkaido. Mammalian Science, 43, 39-43.

Hirai, T., & Kimura, S. (2004). Diet composition of the common bat Pipistrellus abramus (Chiroptera; Vespertilionidae), revealed by fecal analysis. Japanese Journal of Ecology, 54, 159-163.

Morii, R. (2007). Relationship between monthly emergence frequencies against times and annual life cycle in Pipistrellus abramus, Kagawa Prefecture, Japan. Bulletin of the Biological Society of Kagawa, 34, 107-116.


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.