More than a hundred different bird species breed in the nature reserve. The Zwillbrocker Venn is home to the largest Black-headed Gull colony in Germany, with around 15,000 counted birds. It is also the most northerly located breeding ground for a colony of Greater Flamingo.
For the starting point for the Zwillbrocker Venn hiking route, park at Hotel zum Kloppendiek, in Zwillbrock (Germany) just across the border from the dutch town of Groenlo. You can walk to the observation hide Zwillbrocker Venn Ost and observation hide Zwillbrocker Venn West.