Large outermost flight feathers on wing. Can vary from 9-11, but the number remains constant within a species.
Thin feathers, 10-12 inches long, growing from the "hand" of the wing. They are used in forward propulsion during flight.
The large, lift-giving feathers found at the end of the wing. Bald eagles' primary feathers are notched at the end.
main flight feathers on outer part of wings
The primaries provide the main forward thrust for flight. On the wing, these are the feathers most distal (located nearest to the tip; furthest from the center of the body). Also called beam feathers in the UK, flight feathers or phalangeal feathers.
The main flight feathers along the outer part of the edge of the wing. See topography.
9-10 or more outermost flight feathers, attached to hand
Flight feathers attached to the "hand."
The feathers forming the tip of the wing of a bird, and inserted upon that part which represents the hand of man. 173