Anatidae
Anatidae is a biological family of birds that includes ducks, geese and swans. They range in size from the small teals (weighing 250 – 300 g) to the swans, which may weigh 15 kg or more. All spacies are aquatic, with webbed feet and a broad, flattened bill. Anatids are distributed worldwide, except for the Antarctic region. Many anatids are migratory, although tropical and subtropical species remain close to breeding grounds during non-breeding season.
