Scientific Name: Brachydiplax farinosa [male] Common name(s): EMERALD-FLANKED MARSH HAWK,Black-tailed Dasher Male : Small greyish blue dragonfly with metallic green thorax (sometimes pruinosed in adults) and black tipped abdomen. Juvenile males are black and pale yellow and lack the ashy colouration. Very similar to B.sobrina, but smaller and darker in colour.