Groups of pisciculture ponds. If the farming is led properly the area of ponds is very precious mainstay for wild nature.
In the area of ponds in Kostów and Oxbow lakes of Prosna there is Marsh Harrier. It is also possible to observe Grey Heron, Mute Swan, various kinds of ducks and rarely Black Stork. On the meadows next to ponds there is White Stork that nests on a lonely birch.
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