Below is a drawing comparing the underside of the wing with the top of the wing.
40+ Bird Wing Feather Anatomy. Bird felting reference on these pictures of this page are about:bird wing feather anatomy. Bird anatomy, or the physiological structure of birds' bodies, shows many unique adaptations, mostly aiding flight.
Drawing Folded Bird Wing Anatomy Page 1 Line 17qq Com from img.17qq.com
The bird's wing consists of primary feathers forming the point of the wing, and secondary and tertiary feathers further up. Form the outer coverings of a bird's body, including the wing & tail feathers. Feathers are the most unique aspect of a bird's anatomy.
Compare the far more common humanlike hand.
The barbs of the feather hook together to form an airtight seal to resist the wind and also to provide insulation. Look at the bird skeleton picture in the book. These elements make feathers last for a long time as a functional part of a bird's body. Feathers are fundamental to many aspects of a bird's existence.
