Oak procession moth outbreak prompts zoo closures and alarms Nordic nations

The oak procession moth (Eichenprozessionsspinner) is spreading northward, aided by climate change. After severe infestations in Germany this summer, large populations have been reported in Denmark, especially in Odense on the island of Funen. Authorities link the surge to the import of oak trees from Germany on which the moth laid eggs. The larvae produce thousands of tiny urticating hairs that can cause skin irritation, allergic rashes and, in rare cases, respiratory problems.

In response, the Odense Zoo has temporarily closed the beech‑top area where a single nest was found and is using adhesive and vacuum methods to remove the caterpillars. The zoo will also install nest boxes for tits, which are natural predators of the moths. The Danish nature and animal‑welfare ministry, the Norwegian Institute for Nature Research and Swedish officials warn that the moth could soon cross the Øresund into Norway and Sweden, prompting regional monitoring and public‑health advisories.