A swan is a large waterbird known for its graceful appearance and long neck. They belong to the family Anatidae, which also includes ducks and geese. Swans are typically found in freshwater lakes, rivers, and ponds, where they feed on aquatic plants, insects, and small fish. They are known for their strong, powerful wings and can fly long distances. Swans are social animals and often form monogamous pairs, mating for life. They are also known for their elaborate courtship displays, which include synchronized swimming and head bobbing. The most common species include the mute swan, trumpeter swan, and whooper swan.