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Photo Credits
- 1. (c) Nathan Taylor, some rights reserved (CC BY-NC), uploaded by Nathan Taylor
- 2. (c) Mary PK Burns, some rights reserved (CC BY-NC)
- 3. (c) Steven Severinghaus, some rights reserved (CC BY-NC-SA)
- 4. (c) Sara Rall, some rights reserved (CC BY-NC), uploaded by Sara Rall
- 5. (c) Leonora Enking, some rights reserved (CC BY-SA)
- 6. (c) Douglas Goldman, some rights reserved (CC BY), uploaded by Douglas Goldman
- 7. (c) Dan Mullen, some rights reserved (CC BY-NC-ND)
- 8. (c) Bob Gutowski, some rights reserved (CC BY-NC-SA)
- 9. (c) Cody Hough, some rights reserved (CC BY-NC-SA)
- 10. (c) Joshua Reynolds, some rights reserved (CC BY-NC), uploaded by Joshua Reynolds
- 11. (c) snapshotswithsheila, some rights reserved (CC BY-NC), uploaded by snapshotswithsheila
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- 13. (c) Dave Scamardella, some rights reserved (CC BY-NC), uploaded by Dave Scamardella
- 14. (c) Jason Sturner, some rights reserved (CC BY)
- 15. (c) Erika Mitchell, some rights reserved (CC BY-NC), uploaded by Erika Mitchell
- 16. (c) Owen Clarkin, some rights reserved (CC BY-NC), uploaded by Owen Clarkin
- 17. (c) Keith Kanoti, Maine Forest Service, USA, some rights reserved (CC BY)
- 18. (c) Michael Rayner, some rights reserved (CC BY-NC), uploaded by Michael Rayner
- 19. (c) JanetandPhil, some rights reserved (CC BY-NC-ND)
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- 21. (c) Joe Walewski, some rights reserved (CC BY-NC), uploaded by Joe Walewski
- 22. (c) Shihmei Barger 舒詩玫, some rights reserved (CC BY-NC-ND)
- 23. (c) Will Van Hemessen, some rights reserved (CC BY-NC), uploaded by Will Van Hemessen
- 24. (c) Sean Blaney, some rights reserved (CC BY-NC), uploaded by Sean Blaney
- 25. (c) Danny Barron, some rights reserved (CC BY-NC-ND)
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- 28. (c) Brad Walker, some rights reserved (CC BY-NC), uploaded by Brad Walker
- 29. (c) Joseph D Kurtz, some rights reserved (CC BY-NC), uploaded by Joseph D Kurtz
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- 31. (c) Jenna Braun, some rights reserved (CC BY-NC), uploaded by Jenna Braun
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- 33. (c) Laura and Thomas Marlowe, some rights reserved (CC BY-NC), uploaded by Laura and Thomas Marlowe
- 34. (c) Charlie Hohn, some rights reserved (CC BY), uploaded by Charlie Hohn
- 35. (c) José María Escolano, some rights reserved (CC BY-NC-SA)
- 36. (c) Dwayne Estes, some rights reserved (CC BY-NC), uploaded by Dwayne Estes
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- 46. (c) Daniel Cahen, some rights reserved (CC BY), uploaded by Daniel Cahen
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- 48. (c) Kostas Zontanos, some rights reserved (CC BY-NC), uploaded by Kostas Zontanos
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- 53. (c) thesnaguy, some rights reserved (CC BY-NC-SA), uploaded by thesnaguy
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- 55. (c) Bill Bouton, some rights reserved (CC BY-SA)
- 56. (c) Mark Warman, some rights reserved (CC BY-NC), uploaded by Mark Warman
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- 61. (c) Phil, some rights reserved (CC BY-NC-ND)
- 62. (c) Ana Albertos, some rights reserved (CC BY-NC), uploaded by Ana Albertos
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- 64. (c) Andy Fyon, some rights reserved (CC BY-NC), uploaded by Andy Fyon
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- 66. (c) Sarah, some rights reserved (CC BY-SA)
- 67. (c) Mateo Hernandez Schmidt, some rights reserved (CC BY-NC-SA), uploaded by Mateo Hernandez Schmidt
- 68. (c) revaz, some rights reserved (CC BY-NC), uploaded by revaz
- 69. (c) Bas Kers, some rights reserved (CC BY-NC-SA)
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- 73. (c) Ken-ichi Ueda, some rights reserved (CC BY)
- 74. (c) Jürgen Mangelsdorf, some rights reserved (CC BY-NC-ND)
- 75. (c) Mike Leveille, some rights reserved (CC BY-NC), uploaded by Mike Leveille
- 76. (c) Jakob Fahr, some rights reserved (CC BY-NC), uploaded by Jakob Fahr
