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Photo Credits
- 1. (c) m4duncan, some rights reserved (CC BY-NC)
- 2. (c) TreesOfTheWorld.net, some rights reserved (CC BY-NC-SA)
- 3. (c) dogtooth77, some rights reserved (CC BY-NC-SA)
- 4. (c) Wolfgang Siebeneich, some rights reserved (CC BY-NC), uploaded by Wolfgang Siebeneich
- 5. (c) Mark Kluge, some rights reserved (CC BY-NC), uploaded by Mark Kluge
- 6. (c) Erin Faulkner, some rights reserved (CC BY-NC), uploaded by Erin Faulkner
- 7. (c) Patrick Coin, some rights reserved (CC BY-NC-SA)
- 8. (c) Jason M Crockwell, some rights reserved (CC BY-NC-ND), uploaded by Jason M Crockwell
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- 10. (c) Cosmic Cat, some rights reserved (CC BY-NC), uploaded by Cosmic Cat
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- 12. (c) Kew on Flickr, some rights reserved (CC BY-NC-SA)
- 13. (c) Dan Mullen, some rights reserved (CC BY-NC-ND)
- 14. (c) Bob MacInnes, some rights reserved (CC BY)
- 15. (c) greersferry, some rights reserved (CC BY-NC)
- 16. (c) Fluffymuppet, some rights reserved (CC BY-NC)
- 17. (c) Sara Rall, some rights reserved (CC BY-NC), uploaded by Sara Rall
- 18. (c) Owen Clarkin, some rights reserved (CC BY-NC), uploaded by Owen Clarkin
- 19. (c) Carlos G Velazco-Macias, some rights reserved (CC BY-NC), uploaded by Carlos G Velazco-Macias
- 20. (c) Micki Colbeck, some rights reserved (CC BY), uploaded by Micki Colbeck
- 21. (c) jlmason, some rights reserved (CC BY-NC), uploaded by jlmason
- 22. (c) Anh Do, some rights reserved (CC BY-NC), uploaded by Anh Do
- 23. (c) eknuth, some rights reserved (CC BY-NC), uploaded by eknuth
- 24. (c) Carmen Thierry, some rights reserved (CC BY-NC), uploaded by Carmen Thierry
- 25. (c) Stephen Thorpe, some rights reserved (CC BY-NC), uploaded by Stephen Thorpe
- 26. (c) Mary PK Burns, some rights reserved (CC BY-NC)
- 27. (c) Jean-Pol GRANDMONT, some rights reserved (CC BY)
- 28. (c) Samuel Brinker, some rights reserved (CC BY-NC), uploaded by Samuel Brinker
- 29. (c) Eli Sagor, some rights reserved (CC BY-NC)
- 30. (c) Maggie, some rights reserved (CC BY-NC)
- 31. (c) Owen Strickland, some rights reserved (CC BY), uploaded by Owen Strickland
- 32. no rights reserved, uploaded by Robert Creech
- 33. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 34. (c) Greg Maher, some rights reserved (CC BY-NC), uploaded by Greg Maher
- 35. (c) carolr, all rights reserved, uploaded by carolr
- 36. (c) Mary Keim, some rights reserved (CC BY-NC-SA)
- 37. (c) Lois Anne Balin, some rights reserved (CC BY-NC), uploaded by Lois Anne Balin
- 38. (c) Joseph D Kurtz, some rights reserved (CC BY-NC), uploaded by Joseph D Kurtz
- 39. (c) Brad Walker, some rights reserved (CC BY-NC), uploaded by Brad Walker
- 40. (c) JanetandPhil, some rights reserved (CC BY-NC-ND)
- 41. (c) Rob Curtis, some rights reserved (CC BY-NC-SA), uploaded by Rob Curtis
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- 43. (c) Laura Clark, some rights reserved (CC BY), uploaded by Laura Clark
- 44. (c) charley, some rights reserved (CC BY-NC), uploaded by charley
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- 47. (c) Jean-Pol GRANDMONT, some rights reserved (CC BY-SA)
- 48. (c) Román Castañeda Vázquez, some rights reserved (CC BY-NC-SA), uploaded by Román Castañeda Vázquez
- 49. (c) Kristin Jones, some rights reserved (CC BY-NC), uploaded by Kristin Jones
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- 53. (c) Vail Ryan, some rights reserved (CC BY-NC), uploaded by Vail Ryan
- 54. (c) Krzysztof Ziarnek, Kenraiz, some rights reserved (CC BY-SA)
- 55. (c) Bruce Kirchoff, some rights reserved (CC BY)
- 56. (c) Kevin Metcalf, some rights reserved (CC BY-NC), uploaded by Kevin Metcalf
- 57. (c) Eric Knopf, some rights reserved (CC BY-NC), uploaded by Eric Knopf
- 58. (c) Jason Sturner, some rights reserved (CC BY)
- 59. (c) Steven J. Baskauf, some rights reserved (CC BY-NC-SA)
- 60. (c) Matthew Herron, some rights reserved (CC BY-NC), uploaded by Matthew Herron
- 61. (c) Erika Mitchell, some rights reserved (CC BY-NC), uploaded by Erika Mitchell
- 62. (c) Keith Kanoti, Maine Forest Service, USA, some rights reserved (CC BY)
- 63. (c) Michael Gras, M.Ed., some rights reserved (CC BY)
- 64. (c) Homer Edward Price, some rights reserved (CC BY)
- 65. (c) Tony Rodd, some rights reserved (CC BY-NC-SA)
- 66. (c) Roger Birkhead, some rights reserved (CC BY-NC-ND), uploaded by Roger Birkhead
- 67. (c) Leonora Enking, some rights reserved (CC BY-SA)
- 68. (c) Erik Danielsen, some rights reserved (CC BY-NC), uploaded by Erik Danielsen
- 69. (c) Bob Gutowski, some rights reserved (CC BY-NC-SA)
- 70. (c) Dwayne Estes, some rights reserved (CC BY-NC), uploaded by Dwayne Estes
- 71. (c) Matt Bertone, all rights reserved, uploaded by Matt Bertone
- 72. (c) Adrian Stewart, some rights reserved (CC BY-NC), uploaded by Adrian Stewart
- 73. (c) Andreas Rockstein, some rights reserved (CC BY-SA)
- 74. (c) Cassiopée2010, some rights reserved (CC BY-NC-SA)
- 75. no rights reserved, uploaded by rockybajada
- 76. (c) Chris M, some rights reserved (CC BY)
- 77. (c) julien2007, some rights reserved (CC BY-NC)
- 78. (c) Joel Abroad, some rights reserved (CC BY-NC-SA)
- 79. (c) Ava Babili, some rights reserved (CC BY-NC-ND)
- 80. (c) John Boback, some rights reserved (CC BY-NC), uploaded by John Boback
