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Photo Credits
- 1. (c) Brian Gratwicke, some rights reserved (CC BY-NC)
- 2. (c) Patrick Coin, some rights reserved (CC BY-NC-SA)
- 3. (c) Andy Kraemer, some rights reserved (CC BY-NC)
- 4. (c) Bruce J. Mohn, some rights reserved (CC BY-NC), uploaded by Bruce J. Mohn
- 5. (c) Saunders Drukker, some rights reserved (CC BY-NC), uploaded by Saunders Drukker
- 6. (c) copepodo, some rights reserved (CC BY-NC-ND)
- 7. (c) Gavan Watson, some rights reserved (CC BY-NC-ND)
- 8. (c) Judy Gallagher, some rights reserved (CC BY-SA), uploaded by Judy Gallagher
- 9. (c) Travis W. Reeder, some rights reserved (CC BY-NC), uploaded by Travis W. Reeder
- 10. (c) Greg Schechter, some rights reserved (CC BY)
- 11. (c) John Clare, some rights reserved (CC BY-NC-ND)
- 12. (c) Andy Jones, some rights reserved (CC BY-NC-SA)
- 13. (c) Dave Thomas, some rights reserved (CC BY-NC)
- 14. (c) Douglas Mills, some rights reserved (CC BY-NC-ND)
- 15. (c) Andrew Hoffman, some rights reserved (CC BY-NC-ND)
- 16. (c) Zeke Franco, some rights reserved (CC BY-NC-ND)
- 17. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 18. (c) Beth Katz, some rights reserved (CC BY-NC-SA), uploaded by Beth Katz
- 19. (c) John Sullivan, some rights reserved (CC BY-NC), uploaded by John Sullivan
- 20. (c) tom spinker, some rights reserved (CC BY-NC-ND)
- 21. (c) Mark Kluge, some rights reserved (CC BY-NC), uploaded by Mark Kluge
- 22. (c) Matthew Ireland, all rights reserved, uploaded by Matthew Ireland
- 23. (c) Diana-Terry Hibbitts, some rights reserved (CC BY-NC), uploaded by Diana-Terry Hibbitts
- 24. (c) Wayne Fidler, some rights reserved (CC BY-NC), uploaded by Wayne Fidler
- 25. (c) Shaun Hayes, some rights reserved (CC BY-NC), uploaded by Shaun Hayes
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- 27. (c) Alan Wolf, some rights reserved (CC BY-NC), uploaded by Alan Wolf
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- 29. (c) Todd Pierson, some rights reserved (CC BY-NC-SA)
- 30. (c) Tristan Clark, some rights reserved (CC BY-NC), uploaded by Tristan Clark
- 31. (c) Josh Vandermeulen, some rights reserved (CC BY-NC-ND), uploaded by Josh Vandermeulen
- 32. (c) Tad Arensmeier, some rights reserved (CC BY)
- 33. (c) midmom, some rights reserved (CC BY-NC)
- 34. (c) Lisa Brown, some rights reserved (CC BY-NC)
- 35. (c) ANDREA JANDA, some rights reserved (CC BY-NC-ND)
- 36. (c) J. N. Stuart, some rights reserved (CC BY-NC-ND)
- 37. (c) Mike Leveille, some rights reserved (CC BY-NC), uploaded by Mike Leveille
- 38. (c) Linda De Volder, some rights reserved (CC BY-NC-ND)
- 39. (c) Carlos Sanchez, some rights reserved (CC BY-NC), uploaded by Carlos Sanchez
- 40. (c) Scott Young, some rights reserved (CC BY-NC)
- 41. (c) Dawn Vornholt, some rights reserved (CC BY-NC-ND)
- 42. (c) Wolfgang Siebeneich, some rights reserved (CC BY-NC), uploaded by Wolfgang Siebeneich
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- 44. (c) Rick Leche - Photography, some rights reserved (CC BY-NC-ND)
- 45. (c) Mike Pennington, some rights reserved (CC BY-SA)
- 46. (c) Donna Pomeroy, some rights reserved (CC BY-NC), uploaded by Donna Pomeroy
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- 53. (c) Per Verdonk, some rights reserved (CC BY-NC)
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- 56. (c) Paul Cools, some rights reserved (CC BY-NC), uploaded by Paul Cools
- 57. (c) Nick Chill, some rights reserved (CC BY-NC-SA)
- 58. (c) 116916927065934112165, some rights reserved (CC BY), uploaded by 116916927065934112165
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- 60. (c) Len Blumin, some rights reserved (CC BY-NC-ND)
- 61. (c) Robin Gwen Agarwal, some rights reserved (CC BY-NC), uploaded by Robin Gwen Agarwal
- 62. (c) Mark Kilner, some rights reserved (CC BY-NC-SA)
- 63. (c) Jack Wolf, some rights reserved (CC BY-NC-ND)
- 64. (c) Julien Renoult, some rights reserved (CC BY), uploaded by Julien Renoult
- 65. (c) Zach Baranowski, some rights reserved (CC BY-NC-ND), uploaded by Zach Baranowski
- 66. (c) Lip Kee, some rights reserved (CC BY-SA)
- 67. (c) Gary Ashley, some rights reserved (CC BY-NC)
- 68. (c) Bob, some rights reserved (CC BY-NC-ND)
- 69. (c) Victor W Fazio III, some rights reserved (CC BY-NC), uploaded by Victor W Fazio III
- 70. (c) Len Blumin, some rights reserved (CC BY)
- 71. (c) TexasEagle, some rights reserved (CC BY-NC)
- 72. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 73. (c) Dan Dzurisin, some rights reserved (CC BY-NC-ND)
- 74. (c) Geoff Coe, some rights reserved (CC BY-NC-ND)
- 75. (c) cindylemon, some rights reserved (CC BY-NC), uploaded by cindylemon
- 76. (c) world_lineage, some rights reserved (CC BY-NC), uploaded by world_lineage
- 77. (c) Wayne, some rights reserved (CC BY-NC)
- 78. (c) Isidro Vila Verde, some rights reserved (CC BY-NC-ND)
- 79. (c) BJ Stacey, some rights reserved (CC BY-NC)
- 80. (c) Alvaro Jaramillo, some rights reserved (CC BY-NC), uploaded by Alvaro Jaramillo
- 81. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 82. (c) fiddleman, some rights reserved (CC BY-NC), uploaded by fiddleman
- 83. (c) Frans Vandewalle, some rights reserved (CC BY-NC)
- 84. (c) Rick Leche, some rights reserved (CC BY-NC-ND)