Insects belong to arthropods among invertebrates, and are the largest animal group on the earth, accounting for more than 50% of all biological species (including bacteria, fungi and viruses), and their traces are almost all over the world. Until 265438+the beginning of the 20th century, the known insect species had exceeded 1 10,000, but there were still many species to be discovered. Insects are the largest species and quantity in the animal kingdom, which have great influence on agricultural production and human health. The most common ones are locusts, butterflies, bees, dragonflies, flies, Cao Meng, cockroaches and so on.
There are not only many kinds of insects, but also an amazing number of individuals in the same species. Insects are widely distributed, and no animal can compare with them, almost all over the earth. There are different kinds. Most insects can be used as specimens, which is a good biological resource that human beings can use. The body of this insect is divided into three parts: head, chest and abdomen. Adults usually have two pairs of wings and six legs, the wings and feet are located in the chest, and the body is composed of a series of body segments, which are further assembled into three body segments (head, chest and abdomen). There are a pair of antennae on the head, and the bones are wrapped outside the body; Life forms have changed a lot, all over the world. It is one of the most diverse arthropods.