On the basis of the territory of the fishing company JSC (UAB) "Birvėtos tvenkiniai", which consists of 33 ponds, a protected area was established in 2004 - the Biosphere Polygon of Birvėta, for the protection of whooper swans, gulls, white-eyed gooses and others birds migration and breed.
More photos: http://www.birvetostvenkiniai.lt/lt/galerija
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