👉 Waterfowl are large, migratory birds that primarily inhabit wetland habitats, such as lakes, rivers, and marshes. They include ducks, geese, mallards, swans, and terns, which range from small to medium-sized birds, with some species reaching up to 20 pounds in weight. Waterfowl are crucial for maintaining the ecological balance of freshwater ecosystems by helping to regulate water levels and nutrient cycling through their diet.