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Photo Credits
- 1. (c) Bob O'Kennon, some rights reserved (CC BY-NC), uploaded by Bob O'Kennon
- 2. (c) Jim Morefield, some rights reserved (CC BY), uploaded by Jim Morefield
- 3. (c) Cullen Hanks, some rights reserved (CC BY-NC), uploaded by Cullen Hanks
- 4. (c) Fritz Flohr Reynolds, some rights reserved (CC BY-SA)
- 5. (c) Prosperoid, some rights reserved (CC BY-NC-SA)
- 6. (c) Eric Keith, some rights reserved (CC BY-NC), uploaded by Eric Keith
- 7. (c) Annika Lindqvist, some rights reserved (CC BY), uploaded by Annika Lindqvist
- 8. (c) Alex Abair, some rights reserved (CC BY-NC), uploaded by Alex Abair
- 9. (c) Chuck Sexton, some rights reserved (CC BY-NC), uploaded by Chuck Sexton
- 10. (c) amy_buthod, some rights reserved (CC BY-NC-SA)
- 11. (c) RASSIL, some rights reserved (CC BY-SA)
- 12. (c) CameliaTWU, some rights reserved (CC BY-NC-SA)
- 13. (c) Gravitywave, some rights reserved (CC BY-NC-SA)
- 14. (c) Gregg Lee, some rights reserved (CC BY-NC-ND), uploaded by Gregg Lee
- 15. (c) Carol Foil, some rights reserved (CC BY-NC-ND)
- 16. (c) conabio_bancodeimagenes, some rights reserved (CC BY-NC-ND), uploaded by conabio_bancodeimagenes
- 17. (c) dbarronoss, some rights reserved (CC BY-NC-ND)
- 18. (c) katiesmith, some rights reserved (CC BY-NC), uploaded by katiesmith
- 19. (c) Frank Vincentz, some rights reserved (CC BY-SA)
- 20. (c) Bodo Nuñez Oberg, some rights reserved (CC BY-NC), uploaded by Bodo Nuñez Oberg
- 21. (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick
- 22. (c) Donna Pomeroy, some rights reserved (CC BY-NC), uploaded by Donna Pomeroy
- 23. (c) Victor W Fazio III, some rights reserved (CC BY-NC), uploaded by Victor W Fazio III
- 24. (c) James Bailey, some rights reserved (CC BY-NC), uploaded by James Bailey
- 25. (c) Fred Melgert / Carla Hoegen, some rights reserved (CC BY-NC), uploaded by Fred Melgert / Carla Hoegen
- 26. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 27. (c) Nicholas Cowey, some rights reserved (CC BY-NC), uploaded by Nicholas Cowey
- 28. (c) Fritz Flohr Reynolds, some rights reserved (CC BY-NC)
- 29. (c) Steve Guttman, some rights reserved (CC BY-NC-ND)
- 30. (c) Matthew Herron, some rights reserved (CC BY-NC), uploaded by Matthew Herron
- 31. (c) C. Mallory, some rights reserved (CC BY-NC), uploaded by C. Mallory
- 32. (c) Matt Lavin, some rights reserved (CC BY-SA)
- 33. (c) Kathy Cox, some rights reserved (CC BY-NC-ND), uploaded by Kathy Cox
- 34. (c) Matthew Allen, some rights reserved (CC BY-NC), uploaded by Matthew Allen
- 35. (c) Ryan McDaniel, some rights reserved (CC BY-NC), uploaded by Ryan McDaniel
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- 37. (c) smwhite, some rights reserved (CC BY-NC), uploaded by smwhite
- 38. (c) Dinesh Valke, some rights reserved (CC BY-NC-SA)
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- 40. (c) Bryan, some rights reserved (CC BY-NC), uploaded by Bryan
- 41. (c) Mark Fishbein, some rights reserved (CC BY-NC), uploaded by Mark Fishbein
- 42. (c) Benjamin J. Dion, some rights reserved (CC BY-NC-SA), uploaded by Benjamin J. Dion
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- 45. (c) Vicki DeLoach, some rights reserved (CC BY-NC-ND)
- 46. (c) Kenneth Bader, some rights reserved (CC BY-NC), uploaded by Kenneth Bader
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- 48. (c) Tania Homayoun, some rights reserved (CC BY-NC-ND), uploaded by Tania Homayoun
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- 50. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 51. (c) mnbrewer, some rights reserved (CC BY-NC-ND), uploaded by mnbrewer
- 52. (c) Minnette Marr, some rights reserved (CC BY-NC), uploaded by Minnette Marr
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- 54. (c) Lois, some rights reserved (CC BY-NC), uploaded by Lois
- 55. no rights reserved, uploaded by Robert Creech
- 56. (c) Mary PK Burns, some rights reserved (CC BY-NC)
- 57. (c) Steve Chilton, some rights reserved (CC BY-NC-ND)
- 58. (c) CameliaTWU, some rights reserved (CC BY-NC-ND)
- 59. (c) David Durieux, some rights reserved (CC BY-NC-ND), uploaded by David Durieux
- 60. (c) smccreadie, some rights reserved (CC BY-NC)
- 61. (c) Conor McMahon, some rights reserved (CC BY-NC), uploaded by Conor McMahon
- 62. (c) Richard Reynolds, some rights reserved (CC BY-NC), uploaded by Richard Reynolds
- 63. (c) Len Blumin, some rights reserved (CC BY-NC-ND)
- 64. (c) geomanuel, some rights reserved (CC BY-NC), uploaded by geomanuel
- 65. (c) Patti, some rights reserved (CC BY-NC), uploaded by Patti
- 66. (c) Steve Harbula, some rights reserved (CC BY-NC), uploaded by Steve Harbula
- 67. (c) Nicola van Berkel, some rights reserved (CC BY-SA), uploaded by Nicola van Berkel
- 68. (c) Katja Schulz, some rights reserved (CC BY)
- 69. (c) Mikael Behrens, some rights reserved (CC BY-NC), uploaded by Mikael Behrens
- 70. (c) AnneTanne, some rights reserved (CC BY-NC)
- 71. (c) J. Fernando Pío León, some rights reserved (CC BY-NC), uploaded by J. Fernando Pío León
- 72. (c) wangyang96, some rights reserved (CC BY-NC)
- 73. (c) Andrew Block, some rights reserved (CC BY-NC), uploaded by Andrew Block
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- 75. (c) Don J Schulte, some rights reserved (CC BY-NC-SA)
- 76. (c) jerickson, some rights reserved (CC BY-NC), uploaded by jerickson
- 77. (c) ellen hildebrandt, some rights reserved (CC BY-NC), uploaded by ellen hildebrandt
- 78. (c) Leigh Anne McConnaughey, some rights reserved (CC BY-SA), uploaded by Leigh Anne McConnaughey
- 79. (c) PINKÉ, some rights reserved (CC BY-NC)
- 80. (c) Anita, some rights reserved (CC BY-NC-SA)
