Edited by Russell Pfau, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Luciano 95, some rights reserved (CC BY-NC-SA)
- 2. (c) zufi, some rights reserved (CC BY-NC)
- 3. (c) Katja Schulz, some rights reserved (CC BY)
- 4. (c) molanic, some rights reserved (CC BY-NC), uploaded by molanic
- 5. (c) Lee Elliott, some rights reserved (CC BY-NC-SA), uploaded by Lee Elliott
- 6. (c) Lena Struwe, some rights reserved (CC BY-SA), uploaded by Lena Struwe
- 7. (c) Omayra, some rights reserved (CC BY-NC), uploaded by Omayra
- 8. (c) Shelia Hargis, some rights reserved (CC BY-NC), uploaded by Shelia Hargis
- 9. (c) Carolyn Gritzmaker, some rights reserved (CC BY-NC), uploaded by Carolyn Gritzmaker
- 10. (c) Jenn Forman Orth, some rights reserved (CC BY-NC-SA)
- 11. (c) Keith Roragen, some rights reserved (CC BY-NC-SA)
- 12. (c) Damon Tighe, some rights reserved (CC BY-NC), uploaded by Damon Tighe
- 13. (c) cotinis, some rights reserved (CC BY-NC-SA)
- 14. (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick
- 15. (c) Ted MacRae, some rights reserved (CC BY-NC-ND)
- 16. (c) Paul Bedell, some rights reserved (CC BY-SA), uploaded by Paul Bedell
- 17. no rights reserved, uploaded by Alejandro Santillana
- 18. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 19. (c) tybird99, some rights reserved (CC BY-NC), uploaded by tybird99
- 20. (c) Jason M Crockwell, some rights reserved (CC BY-NC-ND), uploaded by Jason M Crockwell
- 21. (c) Russell Pfau, some rights reserved (CC BY-NC), uploaded by Russell Pfau
- 22. (c) Monica Krancevic, some rights reserved (CC BY-NC), uploaded by Monica Krancevic
- 23. (c) Elizabeth Rosenauer, some rights reserved (CC BY-NC), uploaded by Elizabeth Rosenauer
- 24. (c) David Illig, some rights reserved (CC BY-NC-SA)
- 25. (c) Sarah Zukoff, some rights reserved (CC BY)
- 26. (c) John B., some rights reserved (CC BY)
- 27. (c) Kai Joaquin, some rights reserved (CC BY-NC), uploaded by Kai Joaquin
- 28. (c) Royal Tyler, some rights reserved (CC BY-NC-SA), uploaded by Royal Tyler
- 29. (c) psweet, some rights reserved (CC BY-SA), uploaded by psweet
- 30. (c) Annika Lindqvist, some rights reserved (CC BY), uploaded by Annika Lindqvist
- 31. (c) Paul Bedell, some rights reserved (CC BY-NC-SA)
- 32. (c) Damiano, some rights reserved (CC BY-NC-ND), uploaded by Damiano
- 33. (c) Victor W Fazio III, some rights reserved (CC BY-NC), uploaded by Victor W Fazio III
- 34. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 35. (c) Theresa Bayoud, all rights reserved, uploaded by Theresa Bayoud
- 36. (c) Edwin M Escobar, some rights reserved (CC BY-NC)
- 37. (c) Chuck Sexton, some rights reserved (CC BY-NC), uploaded by Chuck Sexton
- 38. (c) Royal Tyler, some rights reserved (CC BY-NC-SA)
- 39. no rights reserved, uploaded by Jesse Rorabaugh
- 40. (c) Sean McCann, some rights reserved (CC BY-NC-SA)
- 41. no rights reserved, uploaded by Scott Loarie
- 42. (c) Bob O'Kennon, some rights reserved (CC BY-NC), uploaded by Bob O'Kennon
- 43. (c) David Wilson, some rights reserved (CC BY-NC), uploaded by David Wilson
- 44. (c) Victor W Fazio III, some rights reserved (CC BY-NC-ND), uploaded by Victor W Fazio III
- 45. (c) Kevin Metcalf, some rights reserved (CC BY-NC), uploaded by Kevin Metcalf
- 46. (c) Mike Quinn, Austin, TX, some rights reserved (CC BY-NC), uploaded by Mike Quinn, Austin, TX
- 47. (c) Judy Gallagher, some rights reserved (CC BY), uploaded by Judy Gallagher
- 48. (c) Robby Deans, some rights reserved (CC BY-NC), uploaded by Robby Deans
- 49. (c) Anita Gould, some rights reserved (CC BY-NC), uploaded by Anita Gould
- 50. (c) Jon McIntyre, some rights reserved (CC BY-NC), uploaded by Jon McIntyre
- 51. (c) Eric Isley, some rights reserved (CC BY-NC), uploaded by Eric Isley
- 52. (c) skitterbug, some rights reserved (CC BY), uploaded by skitterbug
- 53. (c) Matthew O'Donnell, some rights reserved (CC BY-NC-SA)
