Thaumetopoea pityocampa processionary larvae nest on a pine tree

animal animals bobbin bobbins bobbins of white thread caterpillar caterpillar nest caterpillars caterpillars nest closeup coniferous conifers dangerous defoliation of forest trees foliage forest infected infection infestation insect insecta larva larvae larvae nest lepidoptera lepidoptera thaumetopoeidae nature needle nest outdoor pine pine processionary pine tree pinetree processionary pityocampa plague plant processionary silk thaumetopoea thaumetopoea pityocampa tree urticaria