The ducks definitely uses their bills its the only way that they could eat.
mouth
mouth or gills
They use their short beaks to gets its food.
A grasshopper's mouth parts are called clypeus, labrum, and palpi. They use mandibles to chew and jaws to crush their food.
their beaks
Cicadas use their mouth parts to suck sap or juices from plants.
Cats use their noses and scent glands in their mouths to find food. They use claws to pull food toward them or to hold a prey. They then use their mouth, teeth, and gums to pull apart and chew food.
True bugs have elongated mouth parts that look like a tube, which they use for sucking up their food.
Both chemical and mechanical digestion take place in the mouth and stomach. The organs both break food into smaller parts, and use enzymes to break down food chemically.
The mouth: the tongue wraps around the grass, and the lower incisors "chop" the grass as the tongue pulls it into the mouth. The grass is then pushed to the back of the mouth, chewed a little bit, then swallowed.
the claws and mouth
use for clothing,shoes and bags