Stick insect, stick whip, belongs to the winged subclass of Orthoptera, named after its slender body, winged or wingless. It is a medium-sized or large-sized insect with a large body length, generally between 6 cm and 24 cm. The largest is 62.4 cm! (Also the largest insect in the world, found in China) The forethorax is short, the middle thorax and the hindthorax are long, especially in wingless species. When the stick insect approaches 6 feet, it is more like a stick and likes the leaves of shrubs and trees. Most winged species have two pairs of wings, the front wing is leathery, long and narrow, with numerous transverse veins, and the veins are fine mesh. Most stick insects are dark brown, and a few are green or dark green. Distributed in China, Hubei, Yunnan, Guizhou and other provinces. Most stick insects are dark brown, and a few are green or dark green. This kind of insect can often reproduce parthenogenetic, with few males, and many unfertilized eggs develop into females.

When injured, the nymph's feet can fall off and regenerate themselves. High temperature, low temperature and dark light can make the body color darker, on the contrary, the body color can be lighter. The body color is different between day and night, which becomes a rhythmic body color change. Stick insects are herbivores. Stick insect is the abbreviation of "insect" (synthetic word, xiū). Such as worms, cotton thin-necked stems and oriental leaves. The shape is slender like bamboo, medium to large, 6 to 24 cm long, green or brown. The head is oval, slightly flat and the mouth is low. Compound eyes are small, oval or spherical, slightly prominent, with 3 or 2 or no single compound eyes. The antenna is short or slender. The chest is short and the back plate is flat. The middle and back chest are long, and the back chest is closely connected with the 1 abdominal segment. There are wings, leathery front wings, membranous rear wings, and some varieties are L-shaped pairs or wingless. The feet are slender or flat, and the forefoot stretches forward when resting. Oviposition hypoplasia. There are 1 pairs of unsegmented tails.