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Photo Credits
- 1. (c) Brian Gratwicke, some rights reserved (CC BY-NC)
- 2. (c) roy pilcher, some rights reserved (CC BY-NC), uploaded by roy pilcher
- 3. (c) Mark Kluge, some rights reserved (CC BY-NC-ND), uploaded by Mark Kluge
- 4. (c) Todd Pierson, some rights reserved (CC BY-NC-SA)
- 5. (c) Rob Curtis, some rights reserved (CC BY-NC-SA), uploaded by Rob Curtis
- 6. (c) ksandsman, some rights reserved (CC BY), uploaded by ksandsman
- 7. (c) benet2006, some rights reserved (CC BY), uploaded by benet2006
- 8. (c) J. N. Stuart, some rights reserved (CC BY-NC-ND)
- 9. (c) Devon Bradley, some rights reserved (CC BY-NC), uploaded by Devon Bradley
- 10. (c) Wolfgang Siebeneich, some rights reserved (CC BY-NC), uploaded by Wolfgang Siebeneich
- 11. (c) Gavan Watson, some rights reserved (CC BY-NC-SA)
- 12. (c) anonymous, some rights reserved (CC BY-SA)
- 13. (c) Rick Leche, some rights reserved (CC BY-NC-ND)
- 14. (c) brendan.lally, some rights reserved (CC BY)
- 15. (c) Francisco Caloca, some rights reserved (CC BY-NC), uploaded by Francisco Caloca
- 16. (c) Distant Hill Gardens, some rights reserved (CC BY-NC-ND)
- 17. (c) Lip Kee Yap, some rights reserved (CC BY-SA)
- 18. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 19. (c) Becky Matsubara, some rights reserved (CC BY)
- 20. (c) Mike's Birds, some rights reserved (CC BY-SA)
- 21. (c) Victor Fazio, some rights reserved (CC BY-NC-SA)
- 22. (c) DaPuglet, some rights reserved (CC BY-SA)
- 23. (c) Mike Leveille, some rights reserved (CC BY-NC), uploaded by Mike Leveille
- 24. (c) moviecoco568, some rights reserved (CC BY)
- 25. (c) Andrew Reding, some rights reserved (CC BY-NC-ND)
- 26. (c) Bering Land Bridge National Preserve, some rights reserved (CC BY)
- 27. (c) pfaucher, some rights reserved (CC BY-NC), uploaded by pfaucher
- 28. (c) m_ignoffo, some rights reserved (CC BY-NC), uploaded by m_ignoffo
- 29. (c) Brian Gratwicke, some rights reserved (CC BY)
- 30. (c) crgillette, some rights reserved (CC BY-NC), uploaded by crgillette
- 31. (c) Dan Mullen, some rights reserved (CC BY-NC-ND)
- 32. (c) Dean Morley, some rights reserved (CC BY-ND)
- 33. (c) Jeff Hooper, some rights reserved (CC BY), uploaded by Jeff Hooper
- 34. (c) Brian Peterson, some rights reserved (CC BY-NC-ND)
- 35. (c) bob15noble, some rights reserved (CC BY-NC), uploaded by bob15noble
- 36. (c) Vicki DeLoach, some rights reserved (CC BY-NC-ND)
- 37. (c) Drriss & Marrionn, some rights reserved (CC BY-NC-SA)
- 38. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 39. (c) Josh Vandermeulen, some rights reserved (CC BY-NC-ND), uploaded by Josh Vandermeulen
- 40. (c) TexasEagle, some rights reserved (CC BY-NC)
- 41. (c) Greg Schechter, some rights reserved (CC BY)
- 42. (c) Jenn Forman Orth, some rights reserved (CC BY-NC-SA)
- 43. (c) Mary Keim, some rights reserved (CC BY-NC-SA)
- 44. (c) Jonathan (JC) Carpenter, some rights reserved (CC BY-NC), uploaded by Jonathan (JC) Carpenter
- 45. (c) Karen Yukich, some rights reserved (CC BY-NC), uploaded by Karen Yukich
- 46. (c) BlueRidgeKitties, some rights reserved (CC BY-NC-SA)
- 47. (c) Judy Gallagher, some rights reserved (CC BY), uploaded by Judy Gallagher
- 48. (c) Jeff Skrentny, some rights reserved (CC BY-NC), uploaded by Jeff Skrentny
- 49. (c) naturalheritagetech, some rights reserved (CC BY-NC), uploaded by naturalheritagetech
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- 51. (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick
- 52. (c) cassi saari, some rights reserved (CC BY-NC), uploaded by cassi saari
- 53. (c) masaaki2019, some rights reserved (CC BY-NC), uploaded by masaaki2019
- 54. (c) Steve Chilton, some rights reserved (CC BY-NC-ND)
- 55. (c) aarongunnar, some rights reserved (CC BY), uploaded by aarongunnar
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- 57. (c) ljbrown, some rights reserved (CC BY-NC)
- 58. (c) CameliaTWU, some rights reserved (CC BY-NC-SA)
- 59. (c) Michael Ellis, some rights reserved (CC BY), uploaded by Michael Ellis
- 60. (c) CatherineK, some rights reserved (CC BY-SA), uploaded by CatherineK
- 61. (c) JanetandPhil, some rights reserved (CC BY-NC-ND)
- 62. (c) James Gaither, some rights reserved (CC BY-NC-ND)
- 63. (c) Jason Hollinger, some rights reserved (CC BY-ND)
- 64. (c) billy liar, some rights reserved (CC BY-NC-SA)
- 65. (c) Noel Pennington, some rights reserved (CC BY-NC), uploaded by Noel Pennington
- 66. (c) Frank Mayfield, some rights reserved (CC BY-SA)
- 67. (c) Erik Danielsen, some rights reserved (CC BY-NC), uploaded by Erik Danielsen
- 68. (c) ben_montgomery, some rights reserved (CC BY-NC), uploaded by ben_montgomery
- 69. (c) Carol Foil, some rights reserved (CC BY-NC-ND)
- 70. (c) Laura Breeden, some rights reserved (CC BY-NC), uploaded by Laura Breeden
- 71. (c) tlit46, some rights reserved (CC BY-NC), uploaded by tlit46
- 72. (c) Damon Taylor, some rights reserved (CC BY-NC-SA)
- 73. (c) sea-kangaroo, some rights reserved (CC BY-NC-ND), uploaded by sea-kangaroo
- 74. (c) Steve Guttman, some rights reserved (CC BY-NC-ND)
- 75. (c) Samuel Brinker, some rights reserved (CC BY-NC), uploaded by Samuel Brinker
- 76. (c) Michelle Martin, some rights reserved (CC BY-NC), uploaded by Michelle Martin
- 77. (c) Jimmy Smith, some rights reserved (CC BY-NC-ND)
- 78. (c) Joshua Mayer, some rights reserved (CC BY-SA)
- 79. (c) Virginia (Ginny) Sanderson, some rights reserved (CC BY-NC-ND)
- 80. (c) zen Sutherland, some rights reserved (CC BY-NC-SA)
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- 82. (c) Matt Lavin, some rights reserved (CC BY-SA)
- 83. (c) seankent, some rights reserved (CC BY-NC), uploaded by seankent
- 84. (c) Mathew Zappa, some rights reserved (CC BY), uploaded by Mathew Zappa
- 85. (c) Colin Meurk, some rights reserved (CC BY-SA), uploaded by Colin Meurk
- 86. (c) Jean-Pol GRANDMONT, some rights reserved (CC BY-SA)
- 87. (c) Román Castañeda Vázquez, some rights reserved (CC BY-NC-SA), uploaded by Román Castañeda Vázquez
- 88. (c) charley, some rights reserved (CC BY-NC), uploaded by charley
- 89. (c) Dylan, some rights reserved (CC BY-NC), uploaded by Dylan
- 90. (c) AnneTanne, some rights reserved (CC BY-NC)
