The Gwydir River is a significant waterway located in the northern region of New South Wales, Australia. It flows for approximately 400 kilometers, starting from the Great Dividing Range and eventually joining the Barwon River. The river is an essential source of water for agriculture and supports various ecosystems along its banks. The Gwydir River basin is known for its rich biodiversity, including numerous fish species and birdlife. It plays a crucial role in the local economy, particularly in irrigation for crops such as cotton and rice. The river's health is monitored to ensure sustainable management of its resources.