The Oak Processionary (Thaumetopoea processionea) is a moth whose caterpillars can be found in oak forests. They may pose a human irritant because of their poisonous setae (hairs), which may cause skin irritation and asthma.
Read more about Oak Processionary: Distribution, Description, Public Health Problem
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“Below me trees unnumbered rise,
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—John Dyer (1699–1758)