The oak procession is getting closer to Polish. A biologist explains why it is dangerous

Zdjęcie: Foto: Bodo Marks/dpa


The processional oak butterfly is simply a species of tiny nocturnal butterfly. Germany and France have late been struggling with its invasion, m.in, and late there have been warnings that the oak procession has besides reached Polish. "We are unlucky with the lifestyle of procession women," says Dr. Maciej Krzyżyński.