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There are many varieties of wasps, with different structural characteristics and habits. They are divided in social wasps and solitary wasps. Among the first are Hornets, WaSP pints or yellow spots and large wasps mahogany color known as paper wasps; they live in colonies consisting of males, females and sterile workers. Solitary wasps do not include workers; they build individual nests.
The size of the wasps varies greatly from one species to another. Some of the parasite are so tiny that they can develop several of them inside a small insect egg. Other species reach a body length of about 5 cm. The female wasps and the workers possess a Stinger used for attacking their prey or to protect themselves from attackers. The venom of wasps contains histamine and a factor that dissolve red blood cells from the blood. The WaSP sting can be fatal for sensitive people to it. Immunization can be achieved through injections of extracts of antigens. See allergy.
Although, generally speaking, the adult wasps are carnivorous, some also eat plant matter, for example, very ripe fruit. As a rule, the young wasps are fed only with other insects or insect remains. Several species have economic importance, as are the pollinators of crops and because some feed on destructive caterpillars. A species native to Africa acts as predatory beetle eggs Hercules, an insect that causes immense damage in the regions in which the coconut is grown. Many parasitic varieties, which lay their eggs in the body or in the eggs of its host, are useful for some pest control harmful, such as those of the aphid, Apple moth and moth of cotton.
Social wasps build nests, or pepperboxes, of a substance similar to paper, made of chewed fibres. The nests of wasps, Hornets and yellow specks are composed of several layers of cells wrapped in an outer casing of globular in shape. Paper wasps build nests open and flat with a single diaper. The initial construction of the nest is borne by the Queen, who is the only one that survives the winter. The first eggs become workers, who continue the construction of the nest and take charge of the care of hatchlings. In the course of a season, a paper wasp nest can reach 20 cm of diameter and host several hundreds of wasps. The communities of yellow specks wasps can count on several thousand members.