Class Aves Introduction Crossword
Across
- 6. shedding and new growth of feathers
- 7. transitional bird fossil
- 10. protein making up feathers
- 12. wingspan in feet of the albatross
- 15. class of pheasants
- 18. the rate used to measure energy
- 20. the collective feathers of a bird
- 23. class of birds with raptor feet
- 24. horned bill
- 25. vocal organ
Down
- 1. the muscle birds lack for respiration
- 2. claw winged bird
- 3. attachment for flight muscles
- 4. skeletal connection with dinosaurs
- 5. class birds belong
- 8. subphylum birds belong
- 9. one purpose of feathers
- 11. animal generating its own heat
- 13. common name for furcula
- 14. one reason bones are hollow
- 16. modified scales
- 17. helpless state of young
- 19. bird with the shortest wingspan
- 21. another name for dinosaurs
- 22. modified appendages