The duck is a kind of poultry. It has round body, flat big beak, short tail and flat feet with fascia between its fingers which helps it to paddle while swimming. The long neck is in S-shape when swimming. The oil on the top layer of the feathers prevents the underneath feathers from water and keeps the duck warm and dry. Its feathers can be brown, white, green, pink, or violet. The duck is smaller than a swan or goose. It can be found around both fresh and salty water sources. Its foods include fish, aquatic plant, grass, grains, insects and other small animals. The goose resembles a very big swan. The fully-grown up male goose has a lump or protuberance on the upper beak. It was domesticated to control the weed and for consumption.