Muscovy duck (Cairina moschata)

Birds have up to 25,000 feathers, and regular preening keeps each one of those feathers in top condition. Preening is a bird's way of grooming its feathers to keep them in the best condition. While preening, birds remove dust, dirt, and parasites from their feathers and align each feather in the optimum position relative to adjacent feathers and body shape. Most birds will preen several times a day to keep themselves healthy.

The PiP shows this Muscovy duck conditioning its plumage.