panoramic view of wetlands covered with early spring reed with marsh marigold in biebrza river wildlife refuge in north-eastern

biebrza river biebrzanski national park narodowy bpn poland wildflower marsh marigold kingcup caltha palustris kaczeniec kniec blotna reserve wetland wetlands moor marshes marshland swamp swamps wild natural conservation fields grass wildlife refuge water sun horizon spring wood wooded tree trees forest color colorful travel tourism outdoor nature wet