The Biebrza River is located in northeastern Poland and is known for its unique wetlands and rich biodiversity. It flows through the Biebrza National Park, which is one of the largest national parks in the country, providing a habitat for various species of birds and other wildlife. The river stretches approximately 165 kilometers and is characterized by its slow flow and meandering course. It plays a crucial role in the local ecosystem, supporting both flora and fauna, and is a popular destination for nature enthusiasts and birdwatchers.