Onychothemis tonkinensis
The aggressive riverhawk, (Onychothemis tonkinensis) is a species of dragonfly in the family Libellulidae. It is widespread in many Asian countries. 3 subspecies are recognized. Subspecies
 Onychothemis tonkinensis ceylanica Ris, 1912
 Onychothemis tonkinensis siamensis Fraser, 1932
 Onychothemis tonkinensis tonkinensis Martin, 1904

