====== Feather ====== Feathers are epidermal growths that form the distinctive outer covering, or plumage, on birds. They are considered the most complex integumentary structures found in vertebrates, and indeed a premier example of a complex evolutionary novelty. They are among the characteristics that distinguish the extant birds from other living groups. ([[https://en.wikipedia.org/wiki/Feather|source]]) {{scribblenauts-unlimited:f:feather.jpg}}