Birds are covered in feathers
=Feathers keep birds well insulated from cold weather and prevents air from seeping in.=
Kiwi have feathers because they are birds. All birds have feathers, even though the nature of the feathers may differ from that of birds that fly.Kiwi have shaggy feathers which are densely packed, about 2.5cm thick, to keep them warm and dry.
Duck down is a layer of fluffy, not water-proof feathers that grow close to the skin, and all over a young duckling. Their purpose is to keep the duck warm in cold conditions. Other feathers on a ducks are generally waterproof, and are designed to help keep water away from down, aid in flight and cover the body. ~BlackWolf1112
it is feathers
Do birds die? Well the answer is no, they don't. Birds have feathers, that's how they keep warm.
contour and the feathers to keep them warm are down.
They keep them warm and for most of them ables them to fly.
Most birds, including cockatoos, have feathers to help keep them warm and protected in harsh weather.
Most birds' feathers are fairly waterprooof. They have to preen themselves to keep them waterproof.
Young barn owls need feathers to keep them warm and for flight once strong enough.
Penguins are birds and therefore do not have fur. They have feathers, which insulate their bodies and keep them warm. Oils in the feathers help the birds glide through the water.