A sandbar is a natural landform that consists of a ridge of sand or sediment that has built up in a body of water, typically in rivers, lakes, or coastal areas. These formations are created by the movement of water, which deposits sand and sediment in shallow areas. Sandbars can be temporary or permanent, depending on water flow and environmental conditions. Sandbars often serve as important habitats for various wildlife, including birds and fish. They can also affect navigation and water flow, creating shallow areas that may be hazardous for boats. In some cases, sandbars can become popular recreational spots for activities like fishing, swimming, and picnicking.