The term 'Large Waterfowl' can be summarized by the crossword solution of 'Swans'. Swans are a type of large waterfowl that belong to the Anatidae family, which also includes ducks and geese. They are known for their long necks and graceful swimming. Swans are found in many parts of the world, including Europe, Asia, and North America. They are often seen in parks and lakes, where they feed on aquatic plants.