Only the male of the species can fly, as the females are too heavy for their wings to bear their weight. The females use their wings instead to deter predators by rustling them noisily.
The Jungle Nymph Stick Insect Heteropteryx dilatata is the heaviest of all the known stick insects, and is the second heaviest insect in the world. They lay the largest eggs of any insects, with the eggs measuring half an inch in length.
The females are easily distinguishable from the males, as the males are mottled brown and around two-thirds the size of the females. The females are bright green in colour and have far more spines than the males.
The females are also known to be very aggressive and will snap their legs together if provoked, and have many sharp spines lining their legs, so watch those fingers!