Thaumetopoea processionea colony
Thaumetopoea processionea, sometimes known as the oak processionary moth (for the caterpillars’ behavior of traveling in nose-to-tail processions) is a voracious defoliator and also a public health nuisance, with fine, barbed hairs causing toxic effects on the skin and respiratory tracts of humans and other animals. (Photo credit: Philipp Braumiller)