hairs of processionary caterpillars are dangerous for humans and pets

air allergic allergy animal bark blighted bug caterpillar close closeup damage danger dangerous environment focus forest hairs hairy hazard health infection infestation insect invertebrate irritant irritating irritation killer larvae lepidoptera line macro natural nature one open outdoors parasitic poison poisonous procession processionary processionea selective setae single thaumetopoea toxic tree trunk venomous wildlife