Bats in my porch: 22. Mating again

on 21st November 2014

On 4th October 2014, there was, as always, a dominant male Common Fruit Bat (Cynopterus brachyotis) hanging in the porch (above). As usual, he was the first to be there, well before 19:00 hours. His presence attracted a few females and juveniles.

The colony of about eight bats will only by there when both the spotlights are switched on. During this period, the bats would hang from the wooden strips. A few would fly out to return later. Other bats would fly in, some trying to attack the dominant male. Should the spotlights be left on till after midnight, most of the bats would remain until then. Only when the lights were switched off would the bats fly off, usually a few at a time. On nights when the lights were not switched on, the dominant male and two to three others, seldom more, would be present. But they do not remain for long.

On this particular night, there was the dominant male courting a female (see video). Facing him was a secondary male, recognised by his wing flapping behaviour – similar to that of the dominant male but not as vigorous or as consistent.

Suddenly the dominant male grabbed the female, turned her around and copulated with her. At that moment the secondary male flew off. Once copulation was completed, the female similarly flew off, leaving the dominant male flapping his wings vigorously and approaching the remaining females.

YC Wee
October 2014

If you like this post please tap on the Like button at the left bottom of page. Any views and opinions expressed in this article are solely those of the authors/contributors, and are not endorsed by the Lee Kong Chian Natural History Museum (LKCNHM, NUS) or its affiliated institutions. Readers are encouraged to use their discretion before making any decisions or judgements based on the information presented.

YC Wee

Dr Wee played a significant role as a green advocate in Singapore through his extensive involvement in various organizations and committees: as Secretary and Chairman for the Malayan Nature Society (Singapore Branch), and with the Nature Society (Singapore) as founding President (1978-1995). He has also served in the Nature Reserve Board (1987-1989), Nature Reserves Committee (1990-1996), National Council on the Environment/Singapore Environment Council (1992-1996), Work-Group on Nature Conservation (1992) and Inter-Varsity Council on the Environment (1995-1997). He is Patron of the Singapore Gardening Society and was appointed Honorary Museum Associate of the Lee Kong Chian Natural History Museum (LKCNHM) in 2012. In 2005, Dr Wee started the Bird Ecology Study Group. With more than 6,000 entries, the website has become a valuable resource consulted by students, birdwatchers and researchers locally and internationally. The views and opinions expressed in this article are his own, and do not represent those of LKCNHM, the National University of Singapore or its affiliated institutions.

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