Search for: [Description = "European beaver, Castor fiber \(Linnaeus, 1758\) was reintroduced into the lowland part of the Vistula basin in 1975\-1985. The animals originated from the river basins of Neman and Pergola rivers or came from a beaver farm. Sixteen small populations were formed, composing 2 to 11 \(mostly 4\) families. The total number of the reintroduced beavers was 168, and in the first year they set up 64 sites."]

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