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Across
  1. 5. give birth to live young
  2. 8. suck in oxygen
  3. 9. their kin make up large varietys of seabirds
  4. 10. are gracefull flyers
  5. 11. belong to ancient group of reptiles
  6. 13. deoxy ribo nuclaic acid
  7. 14. narrow wings
  8. 18. organisims that retain body heat
  9. 20. evolved in different groups
  10. 21. unique pouch below beak
  11. 22. evolved in different groups
  12. 24. flightless birds
  13. 25. small penguins eat this
Down
  1. 1. long necked seabirds
  2. 2. great danger
  3. 3. used to make jewelry
  4. 4. spends most time basking in large groups
  5. 6. get rid of excess salts
  6. 7. organisims able to control body temperature
  7. 12. low numbers of turtles
  8. 15. the first land tetrapods
  9. 16. cold blooded
  10. 17. four footed
  11. 19. spends life at sea
  12. 23. adapted to land