Species of Austrocordulia are medium - sized , dark - coloured dragonflies , either brown or black with yellow markings .
Austrocordulia is a genus of dragonfly in the family Austrocorduliidae , endemic to northern and eastern Australia .
Species of genus are medium - sized , dark - coloured dragonflies , either brown or black with yellow markings .
Austrocordulia is a genus of dragonfly in the family Austrocorduliidae , endemic to northern and eastern Australia .