A Group.

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Across
  1. 3. Zebras
  2. 4. Bees
  3. 9. Birds
  4. 10. Lions
  5. 11. Ants
  6. 12. Musicians
  7. 13. Friends
  8. 14. Directors
  9. 15. Fish
  10. 17. Players
  11. 19. Pictures
  12. 20. Elephants
  13. 21. Flowers
Down
  1. 1. Ships
  2. 2. Geese
  3. 5. Frogs
  4. 6. Artists
  5. 7. Owls
  6. 8. Grapes
  7. 9. Trees
  8. 11. Students
  9. 13. People
  10. 16. Cattle
  11. 18. Kangaroos