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Photo Credits
- 1. (c) Joachim Louis, some rights reserved (CC BY-NC-ND), uploaded by Joachim Louis
- 2. (c) Mike and Zahra, some rights reserved (CC BY-SA)
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- 4. (c) Eliseo D Moreno, some rights reserved (CC BY-SA), uploaded by Eliseo D Moreno
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- 9. (c) Opuntia Cadereytensis, some rights reserved (CC BY-NC), uploaded by Opuntia Cadereytensis
- 10. (c) Carlos Gonzalez, some rights reserved (CC BY-NC), uploaded by Carlos Gonzalez
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- 12. (c) J. N. Stuart, all rights reserved, uploaded by J. N. Stuart
- 13. (c) Kyla Rushton, some rights reserved (CC BY-NC), uploaded by Kyla Rushton
- 14. (c) Tom Lebsack, some rights reserved (CC BY-NC), uploaded by Tom Lebsack
- 15. (c) Richard Reynolds, some rights reserved (CC BY-NC), uploaded by Richard Reynolds
- 16. (c) David Heckard, some rights reserved (CC BY-NC), uploaded by David Heckard
- 17. (c) Ad Konings, some rights reserved (CC BY-NC), uploaded by Ad Konings
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- 19. (c) Chuck Sexton, some rights reserved (CC BY-NC), uploaded by Chuck Sexton
- 20. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
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- 23. (c) Rob Klotz, some rights reserved (CC BY-NC), uploaded by Rob Klotz
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- 25. (c) Don Verser, some rights reserved (CC BY-NC), uploaded by Don Verser
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- 27. (c) 2012 Gary A. Monroe, some rights reserved (CC BY-NC)
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- 33. (c) Juan Cruzado Cortés, some rights reserved (CC BY-SA), uploaded by Juan Cruzado Cortés
- 34. (c) Ken Bosma, some rights reserved (CC BY-NC), uploaded by Ken Bosma
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- 50. (c) Hailen Ugalde, some rights reserved (CC BY-NC), uploaded by Hailen Ugalde
- 51. (c) Carlos Palomera, some rights reserved (CC BY-NC-ND)
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- 56. (c) Gary Nored, some rights reserved (CC BY-NC), uploaded by Gary Nored
- 57. (c) Octavia Sánchez, some rights reserved (CC BY-NC), uploaded by Octavia Sánchez
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- 59. (c) Julie Pearce, some rights reserved (CC BY-NC), uploaded by Julie Pearce
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- 61. (c) Deer, some rights reserved (CC BY-NC-ND), uploaded by Deer
- 62. (c) Robert J. "Bob" Nuelle, Jr. AICEZS, some rights reserved (CC BY-NC), uploaded by Robert J. "Bob" Nuelle, Jr. AICEZS
- 63. (c) Carlos G Velazco-Macias, some rights reserved (CC BY-NC), uploaded by Carlos G Velazco-Macias
- 64. (c) José Belem Hernández Díaz, some rights reserved (CC BY), uploaded by José Belem Hernández Díaz
- 65. (c) Jesús Niño C., some rights reserved (CC BY-NC), uploaded by Jesús Niño C.
- 66. (c) rpmundo, some rights reserved (CC BY-NC), uploaded by rpmundo
- 67. (c) cwhiting, some rights reserved (CC BY-NC), uploaded by cwhiting
- 68. (c) Ruben Alire, some rights reserved (CC BY-NC), uploaded by Ruben Alire
- 69. (c) Diego Abel Rivera, some rights reserved (CC BY-NC), uploaded by Diego Abel Rivera
- 70. (c) ellen hildebrandt, some rights reserved (CC BY-NC), uploaded by ellen hildebrandt
- 71. (c) Whitney Tsai Nakashima, some rights reserved (CC BY-NC), uploaded by Whitney Tsai Nakashima