Common cockchafer
The adult beetle is 25 to 30 mm long, with a dark head, black pronotum covered with short hairs, and reddish brown elytra with four longitudinal ribs each [...] are 10 to 20 mm in the first autumn, 30 to 35 mm by the following autumn, and 40 to 46 mm in the spring of their third year. The pupa is 25 to 35 mm long [...] body, large head, with strong mandibles and long, hairy, well developed yellow legs. It takes three or four years for the larvae to fully develop. The