oak processionary moth on an oak tree with one single caterpillar crawls across the branches

allergy animal background branch branches caterpillar caterpillars close closeup cocoon control crawls dangerous deutschland eichen garden germany green grün hairy hazard infection insect landscape large larva larvae macro moth nest oak one outdoor outdoors park pest plagitis plant procession processionally processionary processioned processonary prozessionsspinner raupitis reaction season single spreading spring summer thaumetopoea toxic tree web wood