Scientific Name: Raphismia bispina
Common Name: Mangrove Dwarf
This is an uncommon species of dragonfly which inhabits mangrove swamps. It can be found at Changi, Pulau Ubin, Pulau Tekong, Mandai, Sungei Buloh Wetland Reserve and other offshore islands. It is one of the dragonfly species that live and breeds in the salt water of back mangroves swamps and the surrounding vegetation.
The male Raphismia bispina looks like a smaller version of a Brachydiplax chalybea. It is in fact much smaller, lighter, and has a clear wing base. The male tend to perch for long period of time defending their territories against rival males in the mangrove swamps.
The thorax of the male is slate blue with mottled yellow marking on the sides. The eyes are dark brown on top and yellow below. The abdomen is slate blue with the last four segments black. There are two short spines behind the legs and beneath the thorax.
Sub-adult male. The series of whitish streaks on the abdomen against the slate blue and black body is striking.
Another sub-adult but slightly more matured male. It has lesser streaks on the sides of the abdomen than the earlier male.
In Singapore, this species can be found whole year round in the mangrove swamps. I have seen them at Pulau Ubin and SBWR. A small and inconspicuous dragonfly but not difficult to find in the mangrove swamps. At times, they could be quite abundant.