Bird Anatomy

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Across
  1. 5. the voice organ in birds
  2. 6. keeping the eggs warm
  3. 8. Wings built for speed
  4. 10. the long trip many birds take to stay in warm areas
  5. 11. Wings good for lifting heavy objects
  6. 12. a flat bone that the wing muscles attach to
Down
  1. 1. Wings good for maneuvering in the trees
  2. 2. part of the respiratory system that enables birds to hold more oxygen, most have 6-9
  3. 3. thick walled and muscular part of the digestive tract that grinds food
  4. 4. Wings good for long distance flight
  5. 7. egg whites
  6. 9. an enlargement of the esophagus that stores food until it can move to the stomach