They don't, they have feathers on top of their skin.
Birds have feathers on their skin
The body covering on birds is considered the feathers, or plumage. Birds do have skin under their feathers, but their feathers are the outermost covering that protects their bodies.
NO!! because they have feathers
Feathers
Normal skin, with feathers attached to it! :)
Down feathers.
Quails are birds. They have feathers.
Birds have a thin kind of skin underneath their feathers. Their skin is similar to mammals but much more delicate.
Humans do not have feathers because we are mammals, not birds. Feathers are unique to birds and are used for flight, insulation, and display purposes. Humans have evolved hair instead of feathers to regulate body temperature and protect the skin.
They are called Down Feathers. Why, I have no idea.
Feathers
No. Bat wings consist of bare skin. Only birds have feathers.