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Photo Credits
- 1. (c) L S, some rights reserved (CC BY-NC)
- 2. (c) wanderflechten, some rights reserved (CC BY-NC-ND)
- 3. (c) a_rose, some rights reserved (CC BY-NC)
- 4. (c) Liam O'Brien, some rights reserved (CC BY-NC), uploaded by Liam O'Brien
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- 8. (c) Joe Walewski, some rights reserved (CC BY-NC), uploaded by Joe Walewski
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- 11. (c) Rob Curtis, some rights reserved (CC BY-NC-SA), uploaded by Rob Curtis
- 12. (c) Christian Schwarz, some rights reserved (CC BY-NC), uploaded by Christian Schwarz
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- 17. (c) botanico, some rights reserved (CC BY-NC), uploaded by botanico
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- 19. (c) Tomás Curtis, some rights reserved (CC BY-NC), uploaded by Tomás Curtis
- 20. (c) Jakob Fahr, some rights reserved (CC BY-NC), uploaded by Jakob Fahr
- 21. (c) Mark Nofsinger, some rights reserved (CC BY-NC), uploaded by Mark Nofsinger
- 22. (c) Sarka Martinez, some rights reserved (CC BY-NC-SA), uploaded by Sarka Martinez
- 23. (c) marie_antoine, some rights reserved (CC BY-NC)
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- 25. (c) Chris Poling, some rights reserved (CC BY-NC), uploaded by Chris Poling
- 26. (c) Carlos G Velazco-Macias, some rights reserved (CC BY-NC), uploaded by Carlos G Velazco-Macias
- 27. (c) Chris Parrish, some rights reserved (CC BY-SA)
- 28. (c) Steve Kerr, some rights reserved (CC BY), uploaded by Steve Kerr
- 29. (c) Samuel Brinker, some rights reserved (CC BY-NC), uploaded by Samuel Brinker
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- 31. (c) tom_carlberg, some rights reserved (CC BY-NC), uploaded by tom_carlberg
- 32. (c) Andrew Simon, some rights reserved (CC BY-NC), uploaded by Andrew Simon
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- 34. (c) Eva Hedström, some rights reserved (CC BY-NC), uploaded by Eva Hedström
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- 36. (c) Marley Ford, some rights reserved (CC BY-NC), uploaded by Marley Ford
- 37. (c) Carl-Adam Wegenschimmel, some rights reserved (CC BY-NC), uploaded by Carl-Adam Wegenschimmel
- 38. (c) Tony Rebelo, some rights reserved (CC BY-SA), uploaded by Tony Rebelo
- 39. (c) scarriere, some rights reserved (CC BY-NC), uploaded by scarriere
- 40. (c) Nicola van Berkel, some rights reserved (CC BY-SA), uploaded by Nicola van Berkel
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- 42. (c) Kok van Herk, some rights reserved (CC BY-NC-SA)
- 43. (c) Jennifer Rycenga, some rights reserved (CC BY-NC), uploaded by Jennifer Rycenga
- 44. (c) Ken Kellman, some rights reserved (CC BY-NC), uploaded by Ken Kellman
- 45. (c) Alejandro Huereca, some rights reserved (CC BY-NC-ND), uploaded by Alejandro Huereca
- 46. (c) Lena Struwe, some rights reserved (CC BY-SA), uploaded by Lena Struwe
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- 49. (c) Alan Rockefeller, some rights reserved (CC BY), uploaded by Alan Rockefeller
