Together with university teachers from the biology department at PřF OU in Ostrava, we will visit the Polish national park Biebrza. On their rambles through the wetlands surrounding the untamed river Biebrza and through the pine woods on the sand dunes, we shall meet the Common Crane, the Common Tern, the Ruffs, but also the wolf and the moose, whom we came to see in the first place.