Scientific Name: Heliaeschna uninervulata
Common Name: Lesser Night Hawker
Heliaeschna uninervulata is a very rare dragonfly species in Singapore and was only recently recorded in April 2008 from a stream at MacRitchie Reservoir. On the 7th of June 2013, I was at a location at the western part of Singapore for the first time, when I came across a dragonfly which look very familiar to me, resting on the stalk of a plant near to the edge of the reservoir. Initially I thought it was the Gynacantha dohrni which I was quite familiar with, but upon closer examination of it’s anal appendages, I noticed it was of something different from all the Gynacantha Species which I have seen before. I zoomed into the anal appendages and took a few shots for later examination. After some reference from the book by Mr. A.G. Orr and some on-line research, I come to the conclusion that this dragonfly should be the very rare Heliaeschna uninervulata, which I based the distinguishing features on the following two points:
1) the base of the wing median space has only one single cross vein;
2) the shape of the anal appendages is very distinctive. It is flat and broad and has some kind of incision structure
I went to the same place again in August 2013, and saw another male but I am not sure is this the same male which I have seen two months ago. I am very sure this is the kind of habitat which is very suitable for this species to thrive and survive. I do hope one day I will be able to see the female of this species.