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Caterpillar larva of insects of the order Lepidoptera. The body consists of a head three thoracic and ten abdominal segments. Head with powerful sclerotized integument the rest of the body in the majority of soft without large sclerites. Body developed bristles arranged in a certain way is strictly specific to individual families genera and even species. In addition to these primary bristles at older ages in many forms otkrytozhivuschih develops a dense cover of the secondary bristles. The body size of a few millimeters to a 12 cm.

For caterpillars characteristic steam shelkootdelitelnaya iron ducts open on the lower lip. Secreted it secret when exposed to air to form a silk thread used for the construction of the cocoon manufacturing protective web bonding and so leaves.

Throughout his life caterpillars feed intensively nutrient reserves for future development. Caterpillars of most species feed on the green parts of plants. Some develop inside the fruit branches and trunks feeding on the wood on lichens and dead parts of plants Animal residues and on the wax.

caterpillar stage can last from several weeks to several years. As the caterpillar growth molt several times. At the end of its development the caterpillar turns into a chrysalis. Of the latter as a result there is an adult butterfly. With caterpillars superficially similar larvae larvae of insects of the family present sawflies. The name associated with a significant external similarity of the larvae of data with these caterpillars of butterflies. Larva often called larvae of all the families of the superfamily of sawflies a group of families from the order Hymenoptera.

The head is formed thick capsule consisting of six fused segments. Often arbitrarily allocate portions of the head is a relatively small area between the forehead and eyes called cheeks. On the bottom side of the head is the foramen magnum which in most cases is in the form of heart symbol.

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