The famous tree-breeding white stork colony is to be found in the southern part of the March-Auen nature reserve. As a result of a general deterioration in their habitat, caused in part by a changing climate, bird experts fear difficult times for the white stork population over the medium term. Under the stork protection program, Swarovski Optik is financially supporting the WWF in the creation of artificial nests so that the white storks can remain inside the colony. The nests will give young birds active protection against prey and poisoning.