thaumetopoea herculeana green and bluish gray hairy caterpillar, group in grassy meadow

andalusia animal black bluish brown bug butterfly caterpillar caterpillars closeup color consuming crawl creature dangerous eating grass gray green group hairy harmful hole huelva insect irritating isolated larvae leaf lot macro many meadow metamorphosis moth nature nest outdoors painful pest plant processionary spain stinging treatment tree web white wildlife worm