A swan is mostly covered with feathers.
Swan
Feathers and skin
The surface of earth is covered mostly by water.
In 1989' a Nation that is mostly covered in dense forest?
Mostly woodwind instruments
Swan River! No seriously i'm not lieing
Lemurs are covered with fur.
It is mostly covered by prairies
Yes, it is covered by fur.
Ireland is mostly covered with water and grassland
skin
Fur.