Indocnemis orang is a large size and robust build damselfly, frequently spotted hanging around in dark areas along rocky forest streams, in hilly and mountainous régions.
The male is just gorgeous : prothorax and synthorax deep black, the latter with violet antehumeral elongated patches. Side of synthorax almost entirely black except for a yellow stripe (covering the interpleural suture if I am not wrong), sometimes very reduced (aged individuals?). Ventral side of synthorax also yellow.
Abdomen entirely black (i.e. both ventrally and dorsally) , except the 2 or 3 last segments which bear dorsal pale blue spots.
Caudal appendages :
One day I also bumped into an immature male with yellowish - and not violet - patches on the synthorax dorsum.
Immature male. The violet coloration on the dorsum of the synthorax begin to appear
I spotted also another form quite different. I am sure it is a female of
Many time I saw males defending small territories around temporary puddles on rocks and females ovipositing there (in wet moss, mud, rotten wood or leaves, twigs not submerged). Scene of oviposition in the video below.
Female ovipositing in wet moss, on the edge of a small puddle. The male perched nearby, termed "non-contact guarding". Guarding prevents another male from inseminating the female.
Female ovipositing in a twig fell to the ground, above a puddle.
Indocnemis orang is widely distributed in Asia from northeast
India to southern and Malay Peninsula. China
In the hills and mountains around
, this species is a rather common sight in suitable habitat. Hanoi