The River Humber is a large estuary located in northern England, where the rivers Ouse and Trent meet the North Sea. It serves as a natural boundary between the counties of Yorkshire and Lincolnshire. The river is approximately 25 miles long and plays a crucial role in shipping and trade, with the port of Hull situated at its mouth. The Humber is known for its diverse wildlife and scenic landscapes. It features several important habitats, including mudflats and salt marshes, which support various bird species. The river is also crossed by the Humber Bridge, one of the longest suspension bridges in the world.