BIRDS/AVES

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Across
  1. 2. Birds have these covering their legs and feet.
  2. 4. The process of spreading oil on feathers.
  3. 7. The group of birds that cannot fly (e.g., ostrich).
  4. 8. The bone that forms the wishbone in birds.
  5. 11. The transparent eyelid that moves sideways.
  6. 12. The chambered organ that pumps blood.
  7. 13. Birds have these instead of teeth for eating.
Down
  1. 1. The system that includes lungs and air sacs.
  2. 3. Birds are ____________, meaning they maintain a constant body temperature
  3. 5. Birds lay these to reproduce.
  4. 6. The colorful outer covering of birds.
  5. 9. The organ that stores food before digestion.
  6. 10. The opening for digestive, reproductive, and excretory systems.