Argia tibialis (Blue Tipped Dancer) is a species of Odonata in the family narrow-winged damselflies. They are associated with freshwater habitat. Individuals can grow to 33.5 mm.
Comment: "Large" is ambiguous. For details on "Large rivers" (e.g. the Mekong river) see http://worldwildlife.org/biomes/large-river-ecosystems This class will be replaced with a less ambiguous class.