Invasive 'devil's larva' caterpillar reaches Poland, forces playground closures

The invasive moth caterpillar known as korowódka dębówka – dubbed “larwa z piekła rodem” (“larva from hell”) – has spread from Denmark into Poland. Its microscopic hairs can cause severe skin, eye and respiratory irritation and allergic reactions in people and pets.

In Denmark the infestation prompted the temporary shutdown of kindergartens, recycling stations, several playgrounds and sections of sidewalks and bike paths. Polish forest officials now report the caterpillar in multiple voivodeships, including Lesser Poland, Kuyavian‑Pomeranian and Greater Poland, and have issued guidance on removing hairs and washing clothing. Authorities are encouraging public reporting through a mobile‑app and suggest monitoring, diversifying tree plantings and fostering natural predators to curb further spread.