Edited by Eric Nightingale, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Len Blumin, some rights reserved (CC BY-NC-ND)
- 2. (c) Andreu Anguera, some rights reserved (CC BY-NC-ND)
- 3. (c) ian wetton, some rights reserved (CC BY-NC-ND)
- 4. (c) Sergey Yeliseev, some rights reserved (CC BY-NC-ND)
- 5. (c) Nick Chill, some rights reserved (CC BY-NC-SA)
- 6. (c) Mike Baird, some rights reserved (CC BY)
- 7. (c) Jorge Montejo, some rights reserved (CC BY-NC-SA)
- 8. (c) Isidro Vila Verde, some rights reserved (CC BY-NC)
- 9. (c) Doug Greenberg, some rights reserved (CC BY-NC-ND)
- 10. (c) Francesco Veronesi, some rights reserved (CC BY-NC-SA)
- 11. (c) BJ Stacey, some rights reserved (CC BY-NC)
- 12. (c) Sarah, some rights reserved (CC BY-NC-ND)
- 13. (c) Jamie Chavez, some rights reserved (CC BY-NC)
- 14. (c) Guy Monty, some rights reserved (CC BY-NC-SA)
- 15. (c) Kari Pihlaviita, some rights reserved (CC BY-NC)
- 16. (c) Gary Ashley, some rights reserved (CC BY-NC)
- 17. (c) docentjoyce, some rights reserved (CC BY)
- 18. (c) Alan Vernon, some rights reserved (CC BY)
- 19. (c) Stewart Ho, some rights reserved (CC BY-NC-ND)
- 20. (c) Bob, some rights reserved (CC BY-NC-ND)
- 21. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 22. (c) C.V. Vick, some rights reserved (CC BY-NC-ND)
- 23. (c) Kenneth Cole Schneider, some rights reserved (CC BY-NC-SA)
- 24. (c) Paul Cools, some rights reserved (CC BY-NC), uploaded by Paul Cools
- 25. (c) Mr. T in DC, some rights reserved (CC BY-ND)
- 26. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 27. (c) Larry Meade, some rights reserved (CC BY-NC-SA)
- 28. (c) dominic sherony, some rights reserved (CC BY-SA)
- 29. (c) Kanalu Chock, some rights reserved (CC BY-NC-SA)
- 30. (c) marlin harms, some rights reserved (CC BY)
- 31. (c) Pierre-Selim, some rights reserved (CC BY-SA)
- 32. (c) Tatiana Gettelman, some rights reserved (CC BY-NC-SA)
- 33. (c) Maggie.Smith, some rights reserved (CC BY-NC)