Down comes from young chicks.
Another name for bird feathers is down.
Down feathers.
Contour feathers are long, strong, and smooth, while down feathers are soft and fluffy. Contour feathers give birds their coloring and shape and are used in flight. Down feathers provide a layer of insulation.
Down feathers help insulate the body of a bird.
Goose down quilts are filled with bird feathers, thus the name.
they are called Down Feathers.
Feathers
Many species of bird fledglings have grey and white feathers.
They are about 5000 feathers, approximately.
All birds have feathers, and all birds have down, which are the softer, inner feathers.
Down feathers are feathers that lie under a birds body and primary feathers. These feathers are small and puffy, and trap warm air under a bird's feathers.
Very soft feathers are known as down.