ClipArt ETC
"From the head, backward to the tail, the body feathers increase in strength and size, also alter in form; those on the face, or around the base of the bill, being the smallest, the tail coverts longest."

Neck-Covert

"From the head, backward to the tail, the body feathers increase in strength and size, also alter in…

"From the head, backward to the tail, the body feathers increase in strength and size, also alter in form; those on the face, or around the base of the bill, being the smallest, the tail coverts longest."

Tail-Covert

"From the head, backward to the tail, the body feathers increase in strength and size, also alter in…

"Parts of a Feather. a, quill; b, shaft; c, vane; d, down." -Cooper, 1887

Feather Parts

"Parts of a Feather. a, quill; b, shaft; c, vane; d, down." -Cooper, 1887

"In the feathers of a large portion of birds there is a plumiform formation."

Plume

"In the feathers of a large portion of birds there is a plumiform formation."

"This plumule is conspicuous in gallinaceous birds."

Plumule

"This plumule is conspicuous in gallinaceous birds."