The Malayan Jungle Nymph (Heteropteryx dilatata) is the heaviest stick insect in the world, weighing around 65 grams (but only if we’re talking about a female). The males are much smaller (4 in.) than the females (6 in.) and lack the bright green, almost leaf-like appearance taken by the females. Instead, they resemble twigs: skinny, long, and mottled brown in color. Either sex is well equipped to camouflage itself amongst the dense brush of the Malaysian forests they inhabit.