Aquatic birds are species that primarily live in or around water bodies, such as lakes, rivers, and oceans. They have adaptations that help them thrive in these environments, including webbed feet for swimming and specialized feathers that repel water. Common examples of aquatic birds include ducks, swans, and penguins. These birds often feed on fish, crustaceans, and aquatic plants. Their unique behaviors, such as diving and foraging, allow them to efficiently hunt for food. Aquatic birds play a crucial role in their ecosystems by helping to maintain the balance of aquatic life and serving as indicators of environmental health.