The swan is a large aquatic bird closely related to geese and ducks. The swan is known for it`s fierce temperament. he swan is found on both sides of the Equator across the Northern and Southern Hemispheres. The northern swan is generally white in colour with an orange beak as seen in the picture. Swans are omnivorous birds but have a very vegetarian diet. Swans eat underwater vegetation such as seaweed and aquatic plants when they are on the water and a mixture of plants, seeds and berries when they are on land. Swans also eat insects both water and land based and the occasional small fish.