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Photo Credits
- 1. (c) Lynette Schimming, some rights reserved (CC BY-NC)
- 2. (c) Gordilly, some rights reserved (CC BY-NC-ND)
- 3. (c) Colin Meurk, some rights reserved (CC BY-SA), uploaded by Colin Meurk
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- 6. (c) Charles Wohlers, some rights reserved (CC BY-NC-ND)
- 7. (c) Mike Dillon, some rights reserved (CC BY-NC), uploaded by Mike Dillon
- 8. (c) Claire Houck, some rights reserved (CC BY-SA)
- 9. (c) Owen Wolter, some rights reserved (CC BY-NC-ND)
- 10. (c) Christopher Porter, some rights reserved (CC BY-NC-SA)
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- 12. (c) zen Sutherland, some rights reserved (CC BY-NC-SA)
- 13. (c) Marion Anthonisen, some rights reserved (CC BY-NC), uploaded by Marion Anthonisen
- 14. (c) Jeff Chapman, some rights reserved (CC BY-NC), uploaded by Jeff Chapman
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- 17. (c) cgbb2004, some rights reserved (CC BY-NC), uploaded by cgbb2004
- 18. (c) ben_montgomery, some rights reserved (CC BY-NC), uploaded by ben_montgomery
- 19. (c) Steve Guttman, some rights reserved (CC BY-NC-ND)
- 20. (c) Anita363, some rights reserved (CC BY-NC-SA), uploaded by Anita363
- 21. (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick
- 22. (c) tlit46, some rights reserved (CC BY-NC), uploaded by tlit46
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- 24. (c) Jim Varnum, some rights reserved (CC BY-NC), uploaded by Jim Varnum
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- 28. (c) Michelle Martin, some rights reserved (CC BY-NC), uploaded by Michelle Martin
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- 36. (c) Joe Bartok, some rights reserved (CC BY-NC), uploaded by Joe Bartok
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- 39. (c) Dorota (Dorothy), some rights reserved (CC BY-SA)
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- 41. (c) Dinesh Valke, some rights reserved (CC BY-NC-SA)
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- 43. (c) Rob Curtis, some rights reserved (CC BY-NC-SA), uploaded by Rob Curtis
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- 59. (c) Andreas Rockstein, some rights reserved (CC BY-NC), uploaded by Andreas Rockstein
- 60. (c) Nikolai Vladimirov, some rights reserved (CC BY-NC), uploaded by Nikolai Vladimirov
- 61. (c) Robert D Stevenson, some rights reserved (CC BY-NC), uploaded by Robert D Stevenson
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- 63. (c) V.S. Volkotrub, some rights reserved (CC BY-NC), uploaded by V.S. Volkotrub
- 64. (c) Tab Tannery, some rights reserved (CC BY-NC-SA)
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- 66. (c) botany08, some rights reserved (CC BY), uploaded by botany08
- 67. (c) John Ratzlaff, some rights reserved (CC BY-NC-ND), uploaded by John Ratzlaff
- 68. (c) Megan Sebasky, some rights reserved (CC BY-NC), uploaded by Megan Sebasky
- 69. (c) Peter O'Connor, some rights reserved (CC BY-SA)
- 70. (c) Dylan, some rights reserved (CC BY-NC), uploaded by Dylan
- 71. (c) David Badke, some rights reserved (CC BY-SA), uploaded by David Badke
- 72. (c) Sherrie Snyder, some rights reserved (CC BY-NC), uploaded by Sherrie Snyder
- 73. (c) Andre Hosper, some rights reserved (CC BY), uploaded by Andre Hosper
- 74. (c) Pete Woodall, some rights reserved (CC BY-NC), uploaded by Pete Woodall
- 75. (c) Erika Mitchell, some rights reserved (CC BY-NC), uploaded by Erika Mitchell
- 76. (c) Dawn Huczek, some rights reserved (CC BY)
- 77. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 78. (c) Ken-ichi Ueda, some rights reserved (CC BY)
- 79. (c) 2011 Luigi Rignanese, some rights reserved (CC BY-NC)
- 80. (c) Michael Ellis, some rights reserved (CC BY), uploaded by Michael Ellis
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- 82. (c) Haley Selen, some rights reserved (CC BY-NC), uploaded by Haley Selen
- 83. (c) Leo Papandreou, some rights reserved (CC BY-NC-SA)
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- 86. (c) Sean Blaney, some rights reserved (CC BY-NC), uploaded by Sean Blaney
- 87. (c) Joe Walewski, some rights reserved (CC BY-NC), uploaded by Joe Walewski
- 88. (c) Scott Cox, some rights reserved (CC BY-NC-ND), uploaded by Scott Cox