Ducks have several distinct parts that contribute to their unique appearance and functionality. Their body is covered in feathers, which provide insulation and waterproofing. Ducks have a broad, flat bill that helps them filter food from water, and webbed feet that make them excellent swimmers. The anatomy of a duck also includes a strong, lightweight skeleton that aids in flight. Their wings are specially adapted for both flying and maneuvering in water. Additionally, ducks possess a specialized digestive system that allows them to process a varied diet, including plants, insects, and small fish.