Invertebrates, an order of Insecta. Medium or large insects, up to 26 to 33 centimeters in length, such as the giant stick insect (Pharnacia serratipes), which is the longest among current insects. The head is small, the front chest is small, the middle chest and back chest are elongated, with or without wings, and some are shaped like bamboo joints. When the six legs are close to the body, they look more like bamboo joints, so they are called stick insects. They mostly feed on the leaves of shrubs and trees, causing damage to forests. There are no species that live on bamboo and feed on bamboo leaves. The body color of most stick insects is dark brown, and a few are green or dark green; some have wings that look like dry leaves when spread flat, and are called leaf insects. Because their body color is green or tan, and their body shape is very similar to their habitat, they are often regarded as one of the typical representative animals of mimicry. Generally, if you are inactive during the day, your body color and shape will have a protective effect. It feeds on leaves at night and has chewing mouthparts. Develops into a gradual metamorphosis. There are many species, and there are about 2,200 species in the world, mainly distributed in tropical and subtropical areas. There are only more than 20 species in our country. Stick insects are referred to as "萱" (xiū). Such as Macella souchongia, Sipyloides sipylus and Phyllium siccifolium.

In the jungles of southern my country, there lives a kind of bamboo leaf insect, which is also a kind of "imitation expert". The longest bamboo leaf insect can reach more than 30 centimeters long, which can be said to be the longest insect in the world. A bamboo leaf insect living in Honghe Prefecture, Yunnan Province, my country, the Oriental giant tree octopus is the longest insect in Asia. Its appearance resembles a dead branch with several branches, and its smooth yellow-green body has clear and obvious bamboo joints. Normally, this kind of bamboo leaf insect hides motionlessly in the tree with its two front legs together and its four middle legs and hind legs spread out. In the early morning, they move carefully to feed, and sway rhythmically from side to side as they move, making predators think they are branches shaking. Once there are signs of natural enemies or danger, why would it immediately pretend to be dead and fall to the ground like a broken branch, motionless? When the danger passed, they turned over quickly and crawled away quietly.

In the tropical rainforests of Hainan Island and Xishuangbanna, there lives another bamboo leaf insect - Oriental leaf octopus. The body length of this bamboo leaf insect is 7 to 8 centimeters, and the widest part of its abdomen is 4 to 5 centimeters. Their abdomen and wings on their backs are very similar to a wide green broad-leaved leaf in the rain forest. There is a raised "midrib" in the middle of the leaf and branch veins on both sides. The round head is disguised as a petiole, and the feet are disguised as being eaten by other insects. After chewing, the incomplete small leaves are sometimes "installed" with a few "small wormholes"