Family: Calopterygidae
Scientific Name: Vestalis amethystina
Common Name: Common Flashwing
This is a relatively large damselfly, the total body length is about 50-56mm and commonly found near forest streams at Central Catchment Nature Reserves and Bukit Timah Nature Reserves. So far, I have seen this species at MacRitchie reservoir -along the board walk, Upper Seletar Reservoir, Upper Pierce Reservoir, Chestnut Ave forest, and Dairy Farm Nature Reserves.
Males and females look quite alike, the main difference is their anal appendages. Both has metallic green body with very long and thin legs. It has a pair of transparent wings which show off a sparkling bluish purple iridescence from reflection from the light.
This species tend to occur on smaller streams in the primary forests.
PICTURE OF SINGAPORE ODONATA 