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| | | Insects | | Insects live almost everywhere on Earth. They are highly specialized and there are about 30 million different species. Insects can have body sizes from 0.2 to 330 millimeters. What is common to all insects is the highly visible breakdown of the body into three parts: head, chest and abdomen; and the presence of three pairs of legs. | | |
| | | | The individual body segments of insects are solid and are protected with plates of Chitin (back, abdomen and side plates). Insects breathe with the help of tracheae, in addition to various glands in the spaces between these plates. Insects sense their environment with their facet eyes, antenna and sensors, which register heat, humidity, shock and vibration. | | |
| | | | Many insects play an important role in the remineralization of organic substances in soil as they decompose corpses or dead plants. Other species eat live plant parts or feed on other insects or small prey animals. Some species of insects like bees collect nectar or pollen, and thus make an important contribution to the pollination of plants. Insects can also occur as parasites, which suck blood or develop into adults in living tissue. | | |
| | | | A special group within the species are insects which build states, such as termites and Hymenoptera. Fossil evidence from insects has been found, dating back as far as 350 million years. Some fossils are even older. | | |
| | | | Due to the damage they can cause to wooden structures, food supplies, crops or ornamental plants, a number of insects are regarded as pests. These include the blood-sucking insects. | | |
| | | The honey bee, silkworms, grasshoppers and crickets are regarded as useful by humans. Indeed crickets are part of the human diet in many countries. Furthermore in addition to their use in the pharmaceutical industry, certain insects are kept as pets in terrariums.
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| | | Description of images / photos | | 1. | Insect - Hoverfly | | 2. | Insext - Fly on a leave | | 3. | Insect - Ant on a leave | | 4. | Insect - Antophora on a flower | | 5. | Flying Antophora | | 6. | Insect - Yellow Black Hoverfly | | 7. | Insect - Beetle |
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