Crows share a pie

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Across
  1. 3. to fly quickly, dipping down and then back up
  2. 4. to offer an idea, often to persuade
  3. 7. certain
  4. 8. to look quickly at someone or something
  5. 9. as much or as many as you need
  6. 10. a part or piece of something larger
  7. 11. one of eight equal parts
  8. 13. exactly the same in number, amount, or quality
  9. 14. to present a thing or idea to someone to accept or reject
  10. 16. to touch the ground or surface(used with aircraft, birds, and insects)
Down
  1. 1. one of four equal parts
  2. 2. mainly; more than all others
  3. 5. to cut something with one movement of a knife
  4. 6. to divide into separate parts to share with others
  5. 7. to make a harsh, loud scream or other noise
  6. 9. with all the parts; whole
  7. 10. a part of something that is separated from the whole
  8. 12. one of two equal parts
  9. 15. to move wings up and down