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Melolontha melolontha
Imagines (adults) of the common cockchafer reach sizes of 25–30 mm; the forest cockchafer is a bit smaller (20–25 mm). The two species can best be distinguished by the form of their pygidium (the back end): it is long and slender in the common cockchafer, but shorter and knob-shaped at the end in the forest cockchafer. Both have a brown colour. Male cockchafers have seven "leaves" on their antennae, whereas the females have only six.
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