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."
