a closeup of a part of a procession of pine processionary (thaumetopoea pityocampa) caterpillars in early spring

pine processionary thaumetopoea pityocampa caterpillar procession moth bug larva insect animal wild wildlife fauna nature leaves grass soil spring outdoors forest mountain wood biological diversity environment ecology selective focus horizontal closeup macro coniferous destructive hairs irritating allergic global warming harmful itching mediterranean climate change economic pest defoliation colorful caterpillars early spring one species pines cedars central asia north africa southern europe