Onychothemis tonkinensis, the aggressive riverhawk, is a species of dragonfly in the family Libellulidae. It is widespread in many Asian countries. 3 subspecies are recognized.Odonata: Catalogue of the Odonata of the World. Tol J. van, 2008-08-01
Subspecies Onychothemis tonkinensis ceylanica Ris, 1912 Onychothemis tonkinensis siamensis Fraser, 1932 Onychothemis tonkinensis tonkinensis Martin, 1904
See also List of odonates of Sri Lanka List of odonates of India
References
Sources tonkinensis.html World Dragonflies Animal diversity web Sri Lanka Biodiversity