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Photo Credits
- 1. (c) Andreas Rockstein, some rights reserved (CC BY-SA)
- 2. (c) Dinesh Valke, some rights reserved (CC BY-SA)
- 3. (c) Juan Carlos López Domínguez, some rights reserved (CC BY-NC), uploaded by Juan Carlos López Domínguez
- 4. (c) annalake99, some rights reserved (CC BY-NC)
- 5. (c) Ryan Yue Wah Chan, some rights reserved (CC BY-NC), uploaded by Ryan Yue Wah Chan
- 6. no rights reserved, uploaded by 葉子
- 7. (c) Mike Potts, some rights reserved (CC BY-NC-ND), uploaded by Mike Potts
- 8. (c) Andres Hernandez S., some rights reserved (CC BY-NC-SA)
- 9. (c) Tomás Carranza Perales, some rights reserved (CC BY), uploaded by Tomás Carranza Perales
- 10. (c) Scott Morris, some rights reserved (CC BY), uploaded by Scott Morris
- 11. (c) Luis Correa, some rights reserved (CC BY), uploaded by Luis Correa
- 12. (c) akhilesh, some rights reserved (CC BY-NC), uploaded by akhilesh
- 13. (c) Alfonso Torres Duarte, some rights reserved (CC BY-NC), uploaded by Alfonso Torres Duarte
- 14. (c) Dhruvaraj S, some rights reserved (CC BY)
- 15. no rights reserved, uploaded by Ira Gershenhorn
- 16. (c) Hong, some rights reserved (CC BY-NC), uploaded by Hong
- 17. (c) karim_herrera_ico_3c, some rights reserved (CC BY-NC)
- 18. (c) Michelle Monge-Velazquez, some rights reserved (CC BY-NC), uploaded by Michelle Monge-Velazquez
- 19. (c) Cindy Chrisler, some rights reserved (CC BY-NC), uploaded by Cindy Chrisler
- 20. (c) Jan Ho, some rights reserved (CC BY-NC), uploaded by Jan Ho
- 21. (c) obrock, some rights reserved (CC BY-NC), uploaded by obrock
- 22. (c) Te Chang, some rights reserved (CC BY-NC), uploaded by Te Chang
- 23. (c) marcie_praetorius, some rights reserved (CC BY-NC)
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- 25. (c) beingplace, some rights reserved (CC BY-NC), uploaded by beingplace
- 26. (c) 呂一起(Lu i-chi), some rights reserved (CC BY), uploaded by 呂一起(Lu i-chi)
- 27. (c) Meghan Cassidy, some rights reserved (CC BY-SA), uploaded by Meghan Cassidy
- 28. (c) Annamaria Savarino, some rights reserved (CC BY-NC), uploaded by Annamaria Savarino
- 29. (c) Alejandro Huereca Delgado, some rights reserved (CC BY-NC-ND), uploaded by Alejandro Huereca Delgado
- 30. (c) Aurora boreal, some rights reserved (CC BY-NC), uploaded by Aurora boreal
- 31. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 32. (c) Neptalí Ramírez Marcial, some rights reserved (CC BY), uploaded by Neptalí Ramírez Marcial
- 33. (c) Carlos Galindo-Leal, some rights reserved (CC BY-NC), uploaded by Carlos Galindo-Leal
- 34. (c) Mauricio Mercadante, some rights reserved (CC BY-NC-SA)
- 35. (c) Ricardo Arredondo T., some rights reserved (CC BY-NC), uploaded by Ricardo Arredondo T.
- 36. (c) Aurelio Molina Hernández., some rights reserved (CC BY-NC), uploaded by Aurelio Molina Hernández.
- 37. (c) Alfonso Gutiérrez Aldana, some rights reserved (CC BY-NC), uploaded by Alfonso Gutiérrez Aldana
- 38. (c) cinthya_molina, some rights reserved (CC BY-NC)
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- 46. (c) Maribel Armenteros, some rights reserved (CC BY-NC), uploaded by Maribel Armenteros
- 47. (c) Anita Gould, some rights reserved (CC BY-NC), uploaded by Anita Gould
- 48. (c) Julián OLVERA, some rights reserved (CC BY-NC), uploaded by Julián OLVERA
- 49. (c) angiesims321, some rights reserved (CC BY-NC)
- 50. (c) Alvaro Rojas (brújula de aves), some rights reserved (CC BY-NC), uploaded by Alvaro Rojas (brújula de aves)
- 51. (c) Sébastien SANT, some rights reserved (CC BY-NC), uploaded by Sébastien SANT
- 52. (c) Dale Lee Denham-Logsdon, some rights reserved (CC BY-NC), uploaded by Dale Lee Denham-Logsdon
- 53. (c) Mikael Behrens, some rights reserved (CC BY-NC), uploaded by Mikael Behrens
- 54. (c) Hermann Falkner, some rights reserved (CC BY-NC)
- 55. (c) 洪阿愷, some rights reserved (CC BY-NC), uploaded by 洪阿愷
- 56. (c) Erick Noe Tapia Banda, some rights reserved (CC BY-NC), uploaded by Erick Noe Tapia Banda
- 57. (c) Juan Cruzado Cortés, some rights reserved (CC BY-SA), uploaded by Juan Cruzado Cortés
- 58. (c) nadianic, some rights reserved (CC BY-NC)
- 59. (c) Don Loarie, some rights reserved (CC BY), uploaded by Don Loarie
- 60. (c) Gregory Brahian Ortiz, some rights reserved (CC BY-NC), uploaded by Gregory Brahian Ortiz
- 61. (c) Pedro, some rights reserved (CC BY-NC), uploaded by Pedro
- 62. (c) Pablo Carrillo-Reyes, some rights reserved (CC BY-NC), uploaded by Pablo Carrillo-Reyes
- 63. (c) wilichankin, some rights reserved (CC BY-NC)
- 64. (c) David Sarkozi, some rights reserved (CC BY-NC), uploaded by David Sarkozi
- 65. (c) Eugenio Padilla, some rights reserved (CC BY-SA), uploaded by Eugenio Padilla
- 66. (c) Ulises Torres, some rights reserved (CC BY-NC), uploaded by Ulises Torres
- 67. (c) Yeison Herrera Medina, some rights reserved (CC BY-NC), uploaded by Yeison Herrera Medina
- 68. (c) Dra. Laura Elvia Uribe Lara, some rights reserved (CC BY-NC), uploaded by Dra. Laura Elvia Uribe Lara
- 69. (c) Angel Vazquez, some rights reserved (CC BY-NC), uploaded by Angel Vazquez
- 70. (c) Luis Humberto Vicente-Rivera, some rights reserved (CC BY-NC), uploaded by Luis Humberto Vicente-Rivera
- 71. (c) Joey Santore, some rights reserved (CC BY-NC), uploaded by Joey Santore
- 72. (c) Araceli Punni OF, some rights reserved (CC BY-NC), uploaded by Araceli Punni OF
- 73. (c) Krzysztof Ziarnek, Kenraiz, some rights reserved (CC BY-SA)
- 74. (c) Stefano, some rights reserved (CC BY-NC-SA)
- 75. (c) Arturo Hernandez, some rights reserved (CC BY-NC), uploaded by Arturo Hernandez
- 76. (c) Sunnetchan, some rights reserved (CC BY-NC-ND), uploaded by Sunnetchan
- 77. (c) E. Tadeo Hernández A., some rights reserved (CC BY-NC), uploaded by E. Tadeo Hernández A.
- 78. (c) miryampl, some rights reserved (CC BY-NC), uploaded by miryampl
- 79. (c) Oscar Marín, some rights reserved (CC BY-SA), uploaded by Oscar Marín
- 80. (c) Mireya Gissel Turcios, some rights reserved (CC BY-NC), uploaded by Mireya Gissel Turcios
- 81. (c) Carlos Palomera, some rights reserved (CC BY-NC-ND), uploaded by Carlos Palomera
- 82. (c) Bart Wursten, some rights reserved (CC BY-NC-SA)
- 83. (c) majellam, some rights reserved (CC BY-NC)
- 84. (c) Eric Ching, some rights reserved (CC BY-NC), uploaded by Eric Ching
