Form: The length of the stomach is 34~36mm, and that of the back wings is 38~40mm. The color of the male’s body is white gray and the counterpart’s is yellow brown. The female have a black stripe on her body. The front wings are more bigger that the back wings. This dragonflies are more bigger and nimble than Orthatrum albistylum.
Other characters: Orthetrum triangulare melania is also called “dragon dragonfly”. The imago appears from May to October and they inhabit fields, wetland in deep mountain and so on. In Dongbaekdongsan(Gotzawal in Jeju), you can see them aroung the wetland “Meonmulkkak”.