on 21st June 2016
Heliocypha biforata
Heliocypha biforata

“In late March 2016, I was seeking solace and solitude beside a forest stream in Malaysia, with my eyes fixed upon the resident damselflies (Heliocypha biforata, family Chlorocyphidae). The wing tips of the male are black, with metallic violet highlights (above).

Heliocypha biforata
Heliocypha biforata

“In contrast, the female lacks these patterns on her wings (above).

Heliocypha biforata
Heliocypha biforata

“As the sun rose higher in the sky, the intensity of damselfly activity heightened. While a female was busy laying her eggs into a wet branch in mid-stream, a male watched over her intently (above). At regular intervals, he would flick his body upwards, in an apparent declaration that the branch, as well as the female, belonged to him. Occasionally, he would also take short flights to keep rival males away, while enticing other females in the neighbourhood at the same time.

Heliocypha biforata
Heliocypha biforata

“Soon after, a receptive female was lured by his charms, and the pair adopted their nuptial embrace upon the branch, mating in full view of the first female (above).

Heliocypha biforata
Heliocypha biforata

“The mating dance consisted of rhythmical abdominal pulsations by the male, but it was all over in a minute. Without delay, the second female proceeded to oviposit on the very same branch (above).

“A video clip of the male guarding the first ovipositing female, and then mating with a second female may be previewed here:

“A video clip of the second female ovipositing may be previewed here:”

Dr. Leong Tzi Ming
11th June 2016

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.

Other posts by YC Wee

Leave a Reply

Your email address will not be published. Required fields are marked *


Overall visits (since 2005)

Live visitors
Visitors Today

Clustrmaps (since 2016)