Another name for bird feathers is down.
down
lophophorous
lophophorous
The bird with blue, black, and white feathers is called a Blue Jay.
The scientific name for a feather is a feather. however the feathers on a bird are called its "plumage".
Royal cloaks were made of bird feathers. Queen Ka'ahumanu's name means cloak of bird feathers.
Goose down quilts are filled with bird feathers, thus the name.
crissal Tail Feathers are known as Retrices
Down feathers.
pelican
how the feathers protect the bird
As far as we know, there is no bird living without feathers.