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Non-protected areas
The Vistula River and the reservoir in Ł±czany
The wildlife of the Vistula Valley has been heavily transformed and destroyed as a result of river regulations carried out in the last several decades. In the 1950s of the 20th century, a stage of fall was constructed in Ł±czany which blocked the river channel with a concrete dam. Nowadays the stretch of the Vistula above the stage of fall is an important place for birds during their autumn migration, as well as for wintering birds. Numerous flocks gather here: Cygnus olor Mute Swans (more than a thousand wintering individuals), Anas platyrhynchos Mallards (up to six thousand wintering individuals), Coots, Gulls, Mergini Mergansers and Grebes. In the breeding period it is an important place for the Spotted Crake - a rare representative of the family Rallidae; the Marsh Harrier - the only bird of prey nesting in reed-beds; and passerines living in bulrushes. Charadriiformes: Vanellus vanellus the Northern Lapwing and the Common Redshank breed in marshy meadows and sedge sites.
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