Cockchafer (Maybug)

Cockchafer (Maybug)

The cockchafer (or maybug) is a widespread bug in Europe. Its larvae, known as chafer grubs are considered a pest.

Biology

Keywords

cockchafer, beetle, complete metamorphosis, Beetles, chafer grub, hard outer wing, arthropod leg, chitin layer, chitin, abdomen, thorax, animal, insect, arthropod, insects, arthropods, biology

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Scenes

The cockchafer, also known as maybug, is widespread in Europe. Its average length is 2.5–3 cm (1–1.2 in). Both males and females have antennae, they can be distinguished by the number of lamellae on the antennae. While females have 6 of these, males have 7.

  • - It starts in the brain and runs along the abdomen. The ganglia of the ventral nerve cord contain neuron cells and are joined by bundles of nerve fibers.
  • - Insects have an open circulatory system filled with hemolymph. It is circulated by a tube that extends along almost the entire length of the body, from the heart located in the abdomen to the head of the insect, where it flows into the body cavities. It re-enters the tube through openings along its sides. Its function is to transport nutrients and waste. It does not transport breathing gases, this is the task of the trachea system.
  • - They form the excretory system of insects. The tubules filter the hemolymph filling body cavities and release the filtrate into the intestine. There, the useful nutrients (water, sugar, etc.) are absorbed and get back into the hemolymph, waste and toxins are excreted.
  • - Malphigian tubules filter the hemolymph filling body cavities and release the filtrate into this body part. Here the useful materials (water, sugar, etc.) are absorbed and get back into the hemolymph, wastes and toxins are excreted.

Narration

The cockchafer, also known as the maybug, is widespread in Europe. Its average length is 2.5–3 cm (1–1.2 in). Both males and females have antennae, they can be distinguished by the number of lamellae on their antennae. While females have 6 of these, males have 7.

Larvae, known as chafer grubs, develop in the soil and feed on the roots of plants, thus they may cause serious damage in agriculture. Depending on the climate, larvae develop into pupae in the summer of their 3rd–5th year. After 6 more weeks, an adult beetle emerges from the pupa, overwinters in the soil, and then works their way to the surface in April or May.

As with other insects, the body of the cockchafer consists of 3 main parts: the head, thorax and abdomen. The head contains the antennae, which serve as chemical sensory organs, as well as the chewing mouthparts and the compound eyes. The thorax contains 3 pairs of legs and 2 pairs of wings. The forewings of beetles are hardened wings (elytra) that protect them, while the hindwings are membranous wings, used for flight.

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