Caliagrion is a monotypic genus of damselflies belonging to the family Coenagrionidae.[4]The single species of this genus, Caliagrion billinghursti,[5]is commonly known as a large riverdamsel,[6] and is endemic to south-eastern Australia, where it inhabits slow-flowing rivers and ponds.[7]
Caliagrion billinghursti is a large damselfly; the male is coloured bright blue with black, while the female is yellow and black.[6]