What two details support the idea that a bird's wing can be used as a defense weapon? A The bird has a shoulder, elbow and wrist, like us."

B One would not think that the feathers could have so much power; but when the wing is extended, the quills of the feathers are hooked with small hooks ..."

C A large bird can give a severe blow with its wing, and when pigeons fight, they are said to hold one wing to protect themselves while hitting the enemy with the other. "

D Woodcocks whistle with their wings as they fly, and mourning doves whisper softly."

E Ruffed grouse produce a drum roll effect with theirs, and others make theirs sound like castanets."