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Photo Credits
- 1. (c) icosahedron, some rights reserved (CC BY), uploaded by icosahedron
- 2. (c) Bob O'Kennon, some rights reserved (CC BY-NC), uploaded by Bob O'Kennon
- 3. (c) John Haslam, some rights reserved (CC BY)
- 4. (c) Tim Quinn, some rights reserved (CC BY-NC), uploaded by Tim Quinn
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- 10. (c) Richard Reynolds, some rights reserved (CC BY-NC), uploaded by Richard Reynolds
- 11. (c) Ron Marusak, some rights reserved (CC BY-NC), uploaded by Ron Marusak
- 12. (c) Bob Romero, some rights reserved (CC BY-NC), uploaded by Bob Romero
- 13. (c) Kristin Jones, some rights reserved (CC BY-NC), uploaded by Kristin Jones
- 14. (c) Román Castañeda Vázquez, some rights reserved (CC BY-NC-SA), uploaded by Román Castañeda Vázquez
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- 18. (c) Carmen Thierry, some rights reserved (CC BY-NC), uploaded by Carmen Thierry
- 19. (c) Dave Scamardella, some rights reserved (CC BY-NC), uploaded by Dave Scamardella
- 20. (c) Keith Kanoti, Maine Forest Service, USA, some rights reserved (CC BY)
- 21. (c) Danny Barron, some rights reserved (CC BY-NC-ND)
- 22. (c) Dan Mullen, some rights reserved (CC BY-NC-ND)
- 23. (c) Dwayne Estes, some rights reserved (CC BY-NC), uploaded by Dwayne Estes
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- 73. (c) Bruce Calvert, some rights reserved (CC BY), uploaded by Bruce Calvert
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- 76. (c) Bob Peterson, some rights reserved (CC BY-SA)
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- 78. (c) Aaron Carlson, some rights reserved (CC BY), uploaded by Aaron Carlson
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- 80. (c) J. N. Stuart, all rights reserved, uploaded by J. N. Stuart
- 81. (c) Bas Kers, some rights reserved (CC BY-NC-SA)
- 82. (c) Erik Danielsen, some rights reserved (CC BY-NC), uploaded by Erik Danielsen
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- 85. (c) M. Goff, some rights reserved (CC BY-NC-SA), uploaded by M. Goff
- 86. (c) Monica Krancevic, some rights reserved (CC BY-NC), uploaded by Monica Krancevic
- 87. (c) Nicola van Berkel, some rights reserved (CC BY-SA), uploaded by Nicola van Berkel
- 88. (c) Patrick Alexander, some rights reserved (CC BY-NC-ND)
- 89. (c) Mark Nenadov, some rights reserved (CC BY-NC), uploaded by Mark Nenadov
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- 91. (c) Brent Franklin, some rights reserved (CC BY-NC), uploaded by Brent Franklin