Feather

Feathers are one of the epidermal growths that form the distinctive outer covering, or plumage, on birds and some non-avian theropod dinosaurs. 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 Aves from other living groups. Feathers have also been noticed in those Theropoda which have been termed feathered dinosaurs. Although feathers cover most parts of the body of birds, they arise only from certain well-defined tracts on the skin. They aid in flight, thermal insulation, waterproofing and coloration that helps in communication and protection.

Famous quotes containing the word feather:

“Self-pity in its early stage is as snug as a feather mattress. Only when it hardens does it become uncomfortable.”
—Maya Angelou (b. 1928)

“A pun is not bound by the laws which limit nicer wit. It is a pistol let off at the ear; not a feather to tickle the intellect.”
—Charles Lamb (1775–1834)

“Who blows death’s feather? What glory is colour?
I blow the stammel feather in the vein.
The loin is glory in a working pallor.
My clay unsuckled and my salt unborn,
The secret child, I shift about the sea
Dry in the half-tracked thigh.”
—Dylan Thomas (1914–1953)