landscape of biebrza national park, meadow with gruop of trees, oaks and birdwatching tower.

area backwaters biebrza biebrzanski birdwatching bpn conserve countryside environment flood grass green greenery gruop landscape marsh marshland meadow national natural nature oaks park podlasie podlaskie poland polish preserve protected region reserve river scene scenery scenic summer swamp swamps tower tree trees view voivodeship water wetland wetlands wilderness