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Photo Credits
- 1. (c) USFWS Mountain-Prairie, some rights reserved (CC BY)
- 2. (c) Andrey Giljov, some rights reserved (CC BY-SA)
- 3. (c) Manuel Sánchez-Mateos Paniagua, some rights reserved (CC BY-NC)
- 4. (c) Marion Zöller, some rights reserved (CC BY-NC), uploaded by Marion Zöller
- 5. (c) Sascha Schulz, some rights reserved (CC BY-NC), uploaded by Sascha Schulz
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- 8. (c) Jakob Fahr, some rights reserved (CC BY-NC), uploaded by Jakob Fahr
- 9. (c) Stefano Porcellotti, some rights reserved (CC BY-NC), uploaded by Stefano Porcellotti
- 10. (c) Brian Starzomski, some rights reserved (CC BY-NC), uploaded by Brian Starzomski
- 11. (c) Aleksandr Popov / Александр Попов, some rights reserved (CC BY-NC), uploaded by Aleksandr Popov / Александр Попов
- 12. (c) Julien Renoult, some rights reserved (CC BY), uploaded by Julien Renoult
- 13. (c) Matthieu Sontag, some rights reserved (CC BY)
- 14. (c) Emőke Dénes, some rights reserved (CC BY-SA)
- 15. (c) Kim, Hyun-tae, some rights reserved (CC BY), uploaded by Kim, Hyun-tae
- 16. (c) Joshua Eastlake, some rights reserved (CC BY-NC), uploaded by Joshua Eastlake
- 17. (c) Michael Yannick, some rights reserved (CC BY-NC), uploaded by Michael Yannick
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- 22. (c) Alexander Yakovlev, some rights reserved (CC BY-NC), uploaded by Alexander Yakovlev
- 23. (c) Paul Bowyer, some rights reserved (CC BY-NC), uploaded by Paul Bowyer
- 24. (c) pfaucher, some rights reserved (CC BY-NC), uploaded by pfaucher
- 25. (c) Michael Gäbler, some rights reserved (CC BY-SA)
- 26. (c) Ján Svetlík, some rights reserved (CC BY-NC-SA)
- 27. (c) Dean Hester, some rights reserved (CC BY-NC-ND), uploaded by Dean Hester
- 28. (c) Dan Roach, some rights reserved (CC BY-NC), uploaded by Dan Roach
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- 34. (c) Иван Тисленко, some rights reserved (CC BY-NC), uploaded by Иван Тисленко
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- 36. (c) liana_joy04, some rights reserved (CC BY-NC), uploaded by liana_joy04
- 37. (c) Bird Explorers, some rights reserved (CC BY-NC), uploaded by Bird Explorers
- 38. (c) Sergey Yeliseev, some rights reserved (CC BY-NC-ND)
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- 40. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 41. (c) Jeremy Barker, some rights reserved (CC BY-NC), uploaded by Jeremy Barker
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- 46. (c) Paul Cools, some rights reserved (CC BY-NC), uploaded by Paul Cools
- 47. (c) Luca Boscain, some rights reserved (CC BY-NC), uploaded by Luca Boscain
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- 49. (c) Roberto Ghiglia, some rights reserved (CC BY-NC), uploaded by Roberto Ghiglia
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- 55. (c) naturpel, some rights reserved (CC BY-NC), uploaded by naturpel
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- 57. (c) Andrej Chudý, some rights reserved (CC BY-NC-SA)
- 58. (c) Ani Sarkisyan, some rights reserved (CC BY), uploaded by Ani Sarkisyan
- 59. (c) Александр, some rights reserved (CC BY-NC-SA), uploaded by Александр
- 60. (c) Илья Сухов, some rights reserved (CC BY-NC), uploaded by Илья Сухов
- 61. (c) Mossos. Generalitat de Catalunya, some rights reserved (CC BY-ND)
- 62. (c) jitensha2021, some rights reserved (CC BY-NC)
- 63. (c) Judy Gallagher, some rights reserved (CC BY-SA), uploaded by Judy Gallagher
- 64. (c) Jörg Hempel, some rights reserved (CC BY-SA), uploaded by Jörg Hempel
- 65. (c) Erika Mitchell, some rights reserved (CC BY-NC), uploaded by Erika Mitchell
- 66. (c) Tony Rebelo, some rights reserved (CC BY-SA), uploaded by Tony Rebelo
- 67. (c) Peggy Lyon, some rights reserved (CC BY-NC), uploaded by Peggy Lyon
- 68. (c) CORDENOS Thierry, some rights reserved (CC BY-NC), uploaded by CORDENOS Thierry
- 69. (c) Gertrud K., some rights reserved (CC BY-NC-SA)
- 70. (c) Christian Berg, some rights reserved (CC BY), uploaded by Christian Berg
- 71. (c) Paul Reeves, some rights reserved (CC BY-NC-SA), uploaded by Paul Reeves
- 72. (c) Hans Hillewaert, some rights reserved (CC BY-SA)
- 73. (c) Emil B, some rights reserved (CC BY-NC), uploaded by Emil B
- 74. (c) Jean-François Rousseau, some rights reserved (CC BY-NC), uploaded by Jean-François Rousseau
- 75. (c) Crystal Hiltz, some rights reserved (CC BY-NC), uploaded by Crystal Hiltz
- 76. (c) Rita Jansen, some rights reserved (CC BY-NC-SA), uploaded by Rita Jansen
- 77. (c) Xavier Rufray, some rights reserved (CC BY-NC), uploaded by Xavier Rufray
- 78. (c) Jennifer Rycenga, some rights reserved (CC BY-NC), uploaded by Jennifer Rycenga
- 79. (c) tamsynmann, some rights reserved (CC BY-NC), uploaded by tamsynmann
- 80. (c) Marco Martinoli, some rights reserved (CC BY-NC-ND)
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- 83. (c) Gonzalo Mucientes Sandoval, some rights reserved (CC BY-NC-SA), uploaded by Gonzalo Mucientes Sandoval
- 84. (c) Guido Schmitz, some rights reserved (CC BY-NC), uploaded by Guido Schmitz
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- 86. (c) Tatiana Antokhina, some rights reserved (CC BY-NC), uploaded by Tatiana Antokhina
- 87. (c) WoRMS for SMEBD, some rights reserved (CC BY-NC-SA)