Variety of duck is a term used to describe the different types of ducks that exist in the world. The most common type of duck is the MALLARD, which is identified by its green head and brown body. The Pintail is another type of duck, which is identified by its long tail feathers. Lastly, the SMEW is a small duck with a white and black plumage. All three of these ducks are examples of the variety of ducks that can be found in the world.