Biebrza is a river in north-eastern Poland, a tributary of the Narew river (near Wizna), with a length of 155 kilometres (28th longest) and the basin area of 7,057 sq. km. (7,051 in Poland).
The Biebrza valley is located 200 km north east of Warsaw in the so-called Green Lungs of Poland.
Biebrza's meadows and pastures turn into yellow marigold fields, where it is easy to hear the living sounds of Biebrza.
Finally, the court jester of Biebrza is the free wheeling otter, this mischievous animal can be observed from long distances frolicking along the waters of Biebrza.