Question

birds is present in form of feathers (what)?​

Answer 1

Answer:

Like the scales of reptiles, and those on the feet of birds, feathers are made of keratin, a fibrous protein also found in hair. ... Contour feathers form most of the surface of the bird, streamlining it for flight and often waterproofing it. The basal portion may be downy and thus act as insulation.

Answer 2

Answer:

birds are most unique thing which makes human happy