It is known that about 4 million different types of insects live on our planet! Scientists studying this species have described approximately 630 thousand species, and there is hardly any hope that someday all species of insects that exist on Earth will be described.
How many insects on earth?
The number of insect species is so great that no other class of animals can even come close to it in number. The number of insects in 1 square. m. of moistened soil ranges from 1000 to 2000, and many insects are even indistinguishable to the human eye.
Many insects and their larvae are successfully used in fishing, being as a nozzle. Such insects include caddis flies, bloodworms, mayflies-taurus, dragonflies, spring butterflies and caterpillars of other different types of butterflies, bark beetles, May beetles, maggots and many others. Larva is one of the phases of the insect's life cycle.
Caddis larvae
Consider some types of larvae. For example, caddis flies live in various reservoirs and arrange houses for themselves from plant stems and shells. These houses move along the bottom with the larva and serve as a refuge for it. In water, the larvae live for about a year, then turn into a chrysalis, and within two weeks butterflies crawl out of the house.
Bloodworm
The bloodworm is the larva of a long-bred mosquito. It looks like a small red worm, lives on the bottom, often in the bottom silt. It also lives on the bottom for a year, then pupates, floats to the surface and turns into a mosquito.
Dragonfly larvae
Dragonfly larvae are found more often in stagnant water bodies or weakly flowing, less often in rivers.Larvae live both deep in the ground and among the vegetation. Before turning into a dragonfly, the larvae creep out onto aquatic plants located along the shore of the reservoir.
The larvae of various beetles are called bark beetles. They are found under the bark of old stumps, as well as in wood warehouses or even in destroyed buildings.
The timing of the transformation of the larva into an insect
The timing of the transformation of the larva into an insect is different - from several days to several years. During this time, the larva molts several times, after each molt the insect becomes more and more like an adult insect. Such a transformation is called incomplete. When the larva is completely unlike an adult insect, and during the last molt it turns into a chrysalis, and then after some time an adult insect appears from the chrysalis, it is called complete transformation.
