The duck is another species that belongs in the family of the birds. The ducks are water species that are smaller than the geese and the swans and can be found in sea and fresh water.
The ducks are often confused with the coots, grebes, gallinules, loons and divers because of their similar appearance. They have long and broad body with long necks.
The end of the body is more like rounded and they have strong and scaled legs that are far from the body. They also have pointed and short wings, but very strong, so their flight requires some continuous and fast strokes.