Beavers are renowned for their ability to build dams, lodges, and canals using branches, mud, and stones. These constructions slow down water flow, creating wetlands that improve water quality, reduce flooding, and increase biodiversity. Their activities encourage the growth of aquatic plants, provide shelter for fish and amphibians, and offer feeding and nesting grounds for birds and mammals. The presence of beavers can therefore lead to healthier and more resilient ecosystems.