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Photo Credits
- 1. (c) Martin Arregui, some rights reserved (CC BY-NC), uploaded by Martin Arregui
- 2. (c) Yaling Lin, some rights reserved (CC BY-NC), uploaded by Yaling Lin
- 3. (c) Chuck Sexton, some rights reserved (CC BY-NC), uploaded by Chuck Sexton
- 4. (c) tonnyrojasc, some rights reserved (CC BY-NC)
- 5. (c) avocat, some rights reserved (CC BY-NC), uploaded by avocat
- 6. (c) Luz de los Milagros, some rights reserved (CC BY-NC), uploaded by Luz de los Milagros
- 7. (c) Hermann Jesús Cortés Blobaum, some rights reserved (CC BY-NC), uploaded by Hermann Jesús Cortés Blobaum
- 8. (c) Mateo Hernandez Schmidt, some rights reserved (CC BY-NC-SA), uploaded by Mateo Hernandez Schmidt
- 9. (c) Choo Yut Shing, some rights reserved (CC BY-NC-SA)
- 10. (c) ricardohm, some rights reserved (CC BY-NC)
- 11. (c) Kinmatsu Lin, some rights reserved (CC BY-NC), uploaded by Kinmatsu Lin
- 12. (c) Robin Gwen Agarwal, some rights reserved (CC BY-NC), uploaded by Robin Gwen Agarwal
- 13. (c) Jonathan Ortiz Torres, some rights reserved (CC BY-NC), uploaded by Jonathan Ortiz Torres
- 14. (c) Jean Eichholtzer, some rights reserved (CC BY-NC), uploaded by Jean Eichholtzer
- 15. (c) 葉子, some rights reserved (CC BY-NC), uploaded by 葉子
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- 17. (c) Francois Wolfaardt, some rights reserved (CC BY-NC), uploaded by Francois Wolfaardt
- 18. (c) Anderson Mesa C, some rights reserved (CC BY-NC), uploaded by Anderson Mesa C
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- 20. (c) Reinaldo Aguilar, some rights reserved (CC BY-NC-SA)
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- 23. (c) Leonardo Adrián LEIVA, some rights reserved (CC BY-NC), uploaded by Leonardo Adrián LEIVA
- 24. (c) keesgroenendijk, some rights reserved (CC BY-SA), uploaded by keesgroenendijk
- 25. (c) Gennadiy Okatov, some rights reserved (CC BY-NC), uploaded by Gennadiy Okatov
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- 27. (c) Jon McIntyre, some rights reserved (CC BY-NC), uploaded by Jon McIntyre
- 28. (c) Ken-ichi Ueda, some rights reserved (CC BY)
- 29. (c) Eric Koberle, some rights reserved (CC BY-NC), uploaded by Eric Koberle
- 30. (c) Mauricio Mercadante, some rights reserved (CC BY-NC-SA)
- 31. (c) Igmar Grewar, some rights reserved (CC BY-NC), uploaded by Igmar Grewar
- 32. (c) marychan55, some rights reserved (CC BY-NC), uploaded by marychan55
- 33. (c) Andres Hernandez S., some rights reserved (CC BY-NC-SA)
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- 35. (c) Gustavo Go, some rights reserved (CC BY-NC), uploaded by Gustavo Go
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- 38. (c) Gabriel Camilo Jaramillo Giraldo, some rights reserved (CC BY-NC-SA), uploaded by Gabriel Camilo Jaramillo Giraldo
- 39. (c) Susan J. Hewitt, some rights reserved (CC BY-NC), uploaded by Susan J. Hewitt
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- 42. (c) Σάββας Ζαφειρίου (Savvas Zafeiriou), some rights reserved (CC BY-NC), uploaded by Σάββας Ζαφειρίου (Savvas Zafeiriou)
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- 45. (c) Horacio Aguilar, some rights reserved (CC BY-NC), uploaded by Horacio Aguilar
- 46. (c) Ben Machado, some rights reserved (CC BY-NC), uploaded by Ben Machado
- 47. (c) Barry Hammel, some rights reserved (CC BY-NC-SA)
- 48. (c) Robert Johnson, some rights reserved (CC BY-NC), uploaded by Robert Johnson
- 49. (c) Frutos Atrativos do Cerrado, some rights reserved (CC BY-NC-SA)
- 50. (c) Forest_13, some rights reserved (CC BY-NC), uploaded by Forest_13
- 51. (c) João Medeiros, some rights reserved (CC BY)
- 52. (c) Ehoarn Bidault, some rights reserved (CC BY-NC), uploaded by Ehoarn Bidault
- 53. (c) José Belem Hernández Díaz, some rights reserved (CC BY), uploaded by José Belem Hernández Díaz
- 54. (c) gabriela_bl, some rights reserved (CC BY-NC), uploaded by gabriela_bl
- 55. (c) Subhajit Roy, some rights reserved (CC BY-NC-ND), uploaded by Subhajit Roy
- 56. (c) Paul Donahue, some rights reserved (CC BY-NC), uploaded by Paul Donahue
- 57. (c) Andreas Kay, some rights reserved (CC BY-NC-SA)
- 58. (c) Ruth Ripley, some rights reserved (CC BY-NC), uploaded by Ruth Ripley
- 59. (c) Sunnetchan, some rights reserved (CC BY-NC-SA), uploaded by Sunnetchan
- 60. (c) Tony Rebelo, some rights reserved (CC BY-SA), uploaded by Tony Rebelo
- 61. (c) Bernard DUPONT, some rights reserved (CC BY-SA)
- 62. (c) Shang-Kwei Wang, some rights reserved (CC BY-NC), uploaded by Shang-Kwei Wang
- 63. (c) Gilles San Martin, some rights reserved (CC BY-SA), uploaded by Gilles San Martin
- 64. (c) pileatedtree, some rights reserved (CC BY-NC), uploaded by pileatedtree
- 65. (c) stremblay21, some rights reserved (CC BY-NC), uploaded by stremblay21
- 66. (c) portioid, some rights reserved (CC BY-SA), uploaded by portioid
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- 68. (c) abelardomendesjr, some rights reserved (CC BY-NC), uploaded by abelardomendesjr
- 69. (c) John, some rights reserved (CC BY-NC)
- 70. (c) Erick Noe Tapia Banda, some rights reserved (CC BY-NC), uploaded by Erick Noe Tapia Banda
- 71. (c) Dinesh Valke, some rights reserved (CC BY-SA)
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- 73. (c) Mary Keim, some rights reserved (CC BY-NC-SA)
- 74. (c) Lisa Johnson, some rights reserved (CC BY-NC), uploaded by Lisa Johnson
- 75. (c) Ma. Eugenia Mendiola González, some rights reserved (CC BY-SA), uploaded by Ma. Eugenia Mendiola González
- 76. (c) James Steamer, some rights reserved (CC BY-NC), uploaded by James Steamer
- 77. (c) Dante S. Figueroa, some rights reserved (CC BY-SA), uploaded by Dante S. Figueroa
- 78. (c) Dick Culbert, some rights reserved (CC BY)
- 79. (c) Peter Vos, some rights reserved (CC BY-NC), uploaded by Peter Vos
- 80. (c) Nelson Wisnik, some rights reserved (CC BY-NC), uploaded by Nelson Wisnik
- 81. (c) Martin Grimm, some rights reserved (CC BY-NC)
- 82. no rights reserved, uploaded by Peter de Lange
- 83. (c) Francisco Ignacio, some rights reserved (CC BY-NC), uploaded by Francisco Ignacio