We live in an age of insects. About half of all known animals are insects. Scientists have found about 1 million species (kinds) of insects so far. There are more species of insects than of any other animal in the world. Bees, flies, ants, grasshoppers, beetles, and butterflies are some of the insects that might live near you.
Insects buzz in the air. They crawl over stones. They hop through grass. They dig tunnels underground.
Some insects are helpful. They do important jobs to help plants grow. They help get rid of wastes and dead plants and animals. Some insects are harmful. They bite or sting. They carry diseases or destroy crops.
What Makes an Insect an Insect?
Insects are invertebrates, or animals without backbones. They breathe air through holes in their bodies. The body of an insect has three main parts called the head, thorax, and abdomen.
Insects go through life stages and have very different forms in each stage. Adult insects usually have three pairs of legs, one pair of antennae, and two pairs of wings.