Fish weirs are structures built in rivers or streams to catch fish. They are typically made from stones, wood, or other materials and create barriers that guide fish into a confined area. This method of fishing has been used for thousands of years by various cultures around the world. These structures can vary in design, depending on the local environment and the species of fish targeted. Fish weirs are often placed in shallow waters, where fish are more likely to swim, making them an effective and sustainable fishing technique. Many indigenous peoples, such as the Native Americans, have historically used fish weirs to support their communities.