What is the difference between feathers and down?
Feathers on geese or ducks is the covering of the skin that makes up the protection and decorative plumage. It repels water and makes it possible for them to fly.
Down is under the feathers and looks like tiny cotton balls. It has a round center called plumage, with thousands of tiny fibers radiating from its core. These fibers link to other down plumules, trapping heat and air, which provides the insulation that keeps the ducks and geese warm.
Feathers keep them dry! Down keeps them warm!