Across
- 1. chopper, rotorcraft
- 3. bird-winged aircraft, flying machine
- 4. wintry, cold
- 7. aggressive, warlike
- 9. bird scientist, avian researcher
- 14. brain inflammation, cerebral infection
- 18. bird study, avian biology
- 20. genetic material, DNA strand
- 21. present, flowing
- 23. sentence structure, grammar
- 24. small-headed, underdeveloped cranially
- 25. cranial, head-related
Down
- 2. money, cash
- 5. micrometer, nanometer
- 6. classification, categorization
- 8. mounted specimens, stuffed animals
- 10. combative, hostile
- 11. pre-war, pre-conflict
- 12. missing, away
- 13. miniature world, small-scale system
- 15. diminish, lessen
- 16. flying reptile, pterosaur
- 17. single-colored, unicolor
- 19. dormancy, winter sleep
- 22. periodic, repeated