"Zygonyx iris", Iridescent Stream Glider, is a widely distributed species, occurring from northeast India to China and south to Borneo. The species breeds in the swift rocky streams, including those in open and agricultural land. Larva are adapted to cling on rocks. A number of subspecies of Zygonyx iris have been described, but it is not clear if these merely represent extremes of geographical variation or genuine subspecies. (ID confirmed by David Raju; co-author, "Dragonflies and Damselflies of Kerala (Keralathile Thumbikal)")