Feathers

Feathers are peculiar to birds.

The bird was covered with white feathers.

The peacock has fair feathers but foul feet.

He was wearing a gold necklace and a coat made of bird feathers.

The male peacock has colorful tail feathers.

Fine feathers make fine birds.

Well, it's just like the proverb "fine feathers make a fine bird". You look really good when you wear a suit.

You sure ruffled her feathers with that anti-feminist joke.

Plato having defined man to be a two-legged animal without feathers, Diogenes plucked a cock and brought it into the Academy, and said, "This is Plato’s man." On which account this addition was made to the definition,—"With broad flat nails."

Feathers are a distinguishing feature of birds.