What are the common insects?

There are many kinds and shapes of insects, and they are the largest number of animals on earth. About 1 million known insects are locusts, butterflies, bees, dragonflies, flies and grasshoppers. Cockroaches, let's take a look at what kinds of insects there are.

Coleoptera

Coleoptera is the largest order in the class Insecta, commonly known as "beetles". There are more than 330000 species, accounting for 40% of the total number of insects. More than 7000 species have been recorded in China. Their forewings are keratinized, hard and veinless, so they are called "sheath wings", hence the name. The exoskeleton is well developed and the body is hard, so it can protect internal organs. The size of the body has changed greatly. This kind of insect is very adaptable. There are chewing mouthparts, a wide range of eating habits, divided into herbivorous, carnivorous, saprophytic, necrophagous, fecal and so on.

Coleoptera is a complete metamorphosis. The larvae have various forms due to their different living environment and feeding habits. The vast majority of pupae are naked pupae and the rare ones are quilt pupae.

Coleoptera insects mainly include all kinds of leaf beetles, flower beetles, step beetles, tiger beetles, Yan beetles, burial beetles, dung beetles and so on.

Lepidoptera

Lepidoptera is the second largest order in the class Insecta after Coleoptera. It is named because of the large number of scales on its body and wings. It is mainly divided into moths and butterflies, and the common recognition feature is siphon mouthparts, which are formed by the specialization of the external jaw lobe of the lower jaw, and the upper jaw degenerates or disappears. Completely perverted. Body and wings densely covered with scales and hairs. Two pairs of wings, membranous, each with a closed middle chamber, the wings are covered with scaly hairs, forming special markings, which are often used in classification. A few wingless or short-winged types. 6 segments of tarsus. No tail beard. All perverts.

The polypod type of Lepidoptera larvae, except for three pairs of chest feet, generally has a pair of abdominal feet in the 3rd ~ 6th and 10th ventral segments, but there is a decrease and specialization, and there are toe hooks at the ends of the abdominal feet. Stripes on the larvae are important in classification. The pupa is the quilt pupa. Adults generally eat nectar, water and other things, no harm (except for a few, such as fruit-sucking night moths damage nearly mature fruit). The vast majority of larvae are terrestrial, herbivorous and harmful to all kinds of plants. A few aquatic creatures.

Butterflies are diurnal Lepidoptera insects that are usually distinguished by their bright colors and rod-shaped antennae, as well as by the way they rest their wings together and set up on their backs. The butterfly's hind wings are enlarged and powerful at the base, supporting and connecting the front wings during flight. There are about 17000 known species of butterflies in the world, all of which are eye-catching insects.

There are more than 1300 species of butterflies in China. Butterflies belong to completely abnormal insects, which go through the stages of egg, larva, pupa, adult and so on. Most of the larvae feed on plants, while the adults suck nectar with siphon mouthparts. Moths are the largest group in Lepidoptera, accounting for about 9% of Lepidoptera species. The appearance of moths varies so much that it is difficult to make a general description. Most moths are nocturnal and dull. There are also some kinds of brightly colored activities during the day. However, moth antennae are different from butterflies in that they do not have rod-shaped antennae, but take on silky, feathery and other patterns. In addition, the front and rear wings of most moths rely on some special connection structures to achieve the existence of wing reins and yoke connected by flying wings, which makes moths and butterflies have more differences.

Diptera

Diptera is a larger order in the class Insecta. Because the adult's front wing is membranous and the hind wing degenerates into a "balance rod". Diptera can be divided into three suborders: long-angle, short-angle and ring-cleft. The antennae of the suborder longhorn are more than 6 nodes, which is a relatively lower group. The antennae of short-horned suborder are less than 5, generally 3, commonly known as "gadfly". The suborder Cycloptera is what we call "flies".

Two-winged insects mainly include mosquitoes, grasshoppers, gnats, gadflies, flies and so on.

Hymenoptera

Hymenoptera insects have obvious characteristics, including chewing and sucking mouthparts, front and rear wings connected by wing hooks and so on. This group is widely distributed, with more than 100000 known species and at least 250000 estimated species. According to whether the base of the abdomen is constricted or not, it can be divided into wide waist suborder and thin waist suborder. The suborder Lepidoptera is a lower herbivorous group, including leaf wasp, tree wasp, stem wasp and so on. The suborder Hymenoptera includes most species of Hymenoptera, including ants, wasps and various parasitic wasps.

Hymenoptera insects are mainly all kinds of ants and bees.

Hemiptera

Hemiptera, which consists of two suborders, Heteroptera and Homoptera, has 133 families and more than 60,000 species. Heteroptera, namely stink bugs, is one of the main groups of insects. The forewings of Hemiptera insects cover the back of the body when at rest, and the hind wings are hidden under them. It is named because the base of the forewing of some groups is ossified and thickened, which becomes "semi-sheathed wing". There are piercing and sucking mouthparts that feed on the juices of plants or other animals. Is an incomplete metamorphosis insect. It has stinky glands in its abdomen, and it will spray out volatile odorous liquid when it is attacked by the enemy. Homoptera includes cicadas, aphids and so on.