Onychothemis testacea, Stellate river hawk, riverhawker, is a species of dragonfly in the family Libellulidae. It is widespread in many Asian countries and locally common over much of its range. It breeds in riffles in clear streams in forest or at its margins. This is a very fast flying dragonfly of forested streams. Males usually perch on dry twigs and other similar vantage points over streams and aggressively chase other dragonflies entering their territory. Females