Overview
- Sightings and nests of the oak processionary moth have surged across many German states this spring and early summer, prompting dozens of municipal reports and expanded monitoring by forestry agencies.
- The moth’s caterpillars carry tiny toxic 'brennhaare' that can cause skin rashes, eye inflammation and breathing problems and can be blown by wind or remain hazardous in abandoned nests for years.
- Cities and districts are prioritising removal at playgrounds, schools, sports facilities and busy public sites and are hiring specialist firms that vacuum or burn nests under strict safety measures.
- Local authorities report sharply rising workloads and bills, with some borough offices saying they receive dozens to over 100 reports daily and expect six-figure costs this year, while state-level support has not been provided.
- Forestry bodies say large-scale treatment in woods is impractical so they rely on warning signs and monitoring, and experts link the species’ northward expansion to warmer, drier conditions that could make recurring outbreaks more likely.