wood trunks cut by wild eurasian beaver in czarna river nature reserve and protected area near piaseczno

area bank beaver bio biodiversity castor conservation czarna deserted diversity doly ecology empty eurasian european fiber field foliage forest grass green greenery krajobrazowy lake landscape life mazovia mazowiecki mazowsze meadow moor natural nature nobody one outdoor panorama panoramic park people piaseczno poland pond protection recreation refresh reserve river scenic shore soil spring swamp thicket travel tree trekking trunk vegetation vivid warsaw warszawa wetland wildlife wood zimne