How have waterfowl adapted to life in the water?

Waterfowl have webbed feet that help them paddle. They have flat bills, and their feathers have a coating of oil that works like waterproofing. The feathers of waterfowl (especially ducks) are both soft and warm.Note: Many pillows, quilts and sleeping bags are stuffed with duck feathers because they are light as well as soft and they bring a lot of warmth.