oak processionary caterpillars, thaumetopoea processionea, on infected pedunculate oak, quercus robur

oak processionary caterpillars thaumetopoea processionea infected pedunculate quercus robur caterpillar sunrise animals burn combat danger dangerous day ermine fire hair forming ground hairs hairy health humans irritation itch light low moth needle nest nests organs plague ramblings respiratory sharp skin striped sunny trunk warm