A growing infestation of toxic caterpillars has prompted warnings, closures, and mounting concern across Berlin, with authorities struggling to contain the spread of the hazardous pests.
The oak processionary moth caterpillar, a species known for its harmful stinging hairs, has been detected in increasing numbers across the German capital. Parks, sports grounds, walking routes, and other public spaces have been temporarily closed as officials attempt to manage the outbreak.
Although the adult moth poses no danger, its caterpillars develop vast numbers of microscopic hairs capable of being carried by the wind over considerable distances. Contact can cause skin rashes, eye irritation, and breathing difficulties, while severe reactions may include allergic shock.
Several Berlin districts, particularly those with large numbers of oak trees, are reporting rising infestations this summer. Media reports indicate that affected areas include Charlottenburg-Wilmersdorf, Treptow-Köpenick, Steglitz-Zehlendorf, and Spandau.
In one housing estate in Jungfernheide, home to more than 11,000 residents, the caterpillars have reportedly spread onto buildings, vehicles, railings, doorways, and lighting fixtures.
The outbreak has sparked criticism of authorities, with some local politicians and residents arguing that responsibility is fragmented between agencies. Health authorities have limited powers because the insects are classified as an allergen, while environmental regulations restrict the use of some pest-control treatments.
Calls are growing for a coordinated response involving district councils, city authorities, and housing providers. Residents have also launched a petition seeking stronger action, attracting thousands of signatures.
Official figures show more than 5,000 infested oak trees were recorded across Berlin last year. Experts warn the problem could intensify as warmer, drier weather creates favourable conditions for the caterpillars.
The pest is widespread across Europe and has also become established in parts of the United Kingdom, where authorities have warned the public to avoid touching either the insects or their nests.
Poisonous caterpillars are infesting residential areas in Berlin. Health authorities are not intervening, so residents are taking matters into their own hands.
➡️ https://t.co/znBrsfr86g pic.twitter.com/w6NLpG6HHI— euronews (@euronews) June 7, 2026
