Chestnut cockchafer

Melolontha hippocastani

Melolontha hippocastani, the northern cockchafer, is a species of scarab beetle native to Eurasia, with its range spanning from Western Europe to the Pacific coast of China. It is one of several species in the genus Melolontha known as cockchafers, alongside the common cockchafer and Melolontha pectoralis, but generally at more northern latitudes, or at higher altitudes in upland woods of further southern Europe. The adults are around 20–29 mm in length. It is distinguished from Melolontha melolontha by the shape of its pygidium, which is primarily black in colour, and red in M. melolontha. It primarily dwells in forests, and as such is also known as the forest cockchafer. The mate-finding behaviour in M. hippocastani is facilitated by plant volatiles and sex pheromones. Mating activities primarily takes place during the evening flight periods. Females lay their eggs in soil, and the larvae scavenges on decaying organic matter and later small plant roots, including the roots of young trees like pines and firs. The larvae usually develop between 3 and 5 years. They emerge between late April and the end of June. Like other cockchafers, they have been considered a serious pest of crops and trees particularly the oak tree. Source

Where it is now

No records in the last 8 weeks. It may be out of season where the observers and sensors are.

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Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.