Birds

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Across
  1. 1. scientific name of birds
  2. 3. name of the mouth of a bird
  3. 4. organ that stores the food in a bird's digestive system
  4. 6. downward vertical flight with close wingspan
  5. 7. another name for warm blooded animals
  6. 9. Feather that helps birds take off
  7. 11. downward vertical flight with open wingspan
  8. 13. the covering of a bird's body
  9. 15. feather from the body of a bird
  10. 16. feather at the back of the bird
  11. 18. frontward motion of birds with a continous movement of the wings
  12. 20. stationary flight of some birds evn thoug their wings are flapping
Down
  1. 2. upward slow horizontal flight with open wingspan usind warm air vents in the atmosphere
  2. 5. study of birds
  3. 8. organ use for reproduction, egg laying and excretion
  4. 10. the skeletal system of a bird is
  5. 12. organ the grinds the food in a bird's digestive system
  6. 14. the covering of a bird's feet
  7. 17. feather that keeps birds warm
  8. 19. organ that stores the air in a bird's respiratory system