Ducks are found on every continent except for Antarctica; all baby ducks are referred to as ducklings, adult male ducks are called drakes, and adult females are called hens or ducks. Groups of ducks are called rafts, teams, or paddlings.
All ducks have a waxy coating on their feathers that makes the feathers waterproof. Ducklings are covered with down when they are born and can get up and leave the nest just hours after they hatch.
Ducks are omnivorous, which means that they eat meat and plants; a duck's diet includes fish, fruits, insects, grass and many other items. Duck bills are specially shaped to help them eat out of the mud -- their bills help separate the water and the mud from food.
Most male ducks are silent, and very few ducks actually quack. Most duck calls are squeaks and grunts. Humans domesticated ducks for life on farms more than 500 years ago; all domestic ducks come from the mallard and Muscovy species. There are more than forty breeds of domesticated ducks, but the White Pekin duck is the most commonly used duck for meat and eggs.
The most famous fictional ducks are Warner Bros.' Daffy Duck and Disney's Donald Duck.