The largest modern day odonate in the world is a actually a damselfly from Central and South America, Megaloprepus coerulatus, with a wing span of approximately 180mm (7.1 inches). The largest dragonfly appears to be the Giant Petaltail (Petalura ingentissima) from northeastern Australia; however, there is some argument about this. The Giant Petaltail has a wingspan of approximately 160mm (6.3 inches). Some claim, however, that the Giant Hawiian Darner (Anax strenuus) is the largest. We have not been able to find the measurements for this dragonfly, but will continue to search for them.