Photos:
- 1. (c) Steve Guttman, some rights reserved (CC BY-NC-ND)
- 2. (c) Tom Norton, some rights reserved (CC BY-NC), uploaded by Tom Norton
- 3. (c) peupleloup, some rights reserved (CC BY-SA)
- 4. (c) Charlie Hohn, some rights reserved (CC BY), uploaded by Charlie Hohn
- 5. (c) Gordilly, some rights reserved (CC BY-NC-ND)
- 6. (c) Susan Elliott, some rights reserved (CC BY-NC), uploaded by Susan Elliott
- 7. (c) Josh*m, some rights reserved (CC BY-NC-SA)
- 8. (c) Liana May, some rights reserved (CC BY-NC), uploaded by Liana May
- 9. (c) Mathew Zappa, some rights reserved (CC BY), uploaded by Mathew Zappa
- 10. (c) Salomé, some rights reserved (CC BY-NC-SA)
- 11. (c) zen Sutherland, some rights reserved (CC BY-NC-SA)
- 12. (c) Danny S., some rights reserved (CC BY-SA)
- 13. (c) manual crank, some rights reserved (CC BY-NC-SA)
- 14. (c) David Hofmann, some rights reserved (CC BY-NC-ND)
- 15. (c) Rob Routledge, some rights reserved (CC BY-NC), uploaded by Rob Routledge
- 16. (c) lvconrad1977, some rights reserved (CC BY-NC), uploaded by lvconrad1977
- 17. (c) Jason Hollinger, some rights reserved (CC BY)
- 18. (c) Jim Morefield, some rights reserved (CC BY)
- 19. (c) mfeaver, some rights reserved (CC BY), uploaded by mfeaver
- 20. (c) Anita363, some rights reserved (CC BY-NC-SA), uploaded by Anita363
- 21. (c) Natural England, some rights reserved (CC BY-NC-ND)
- 22. (c) Homer Edward Price, some rights reserved (CC BY)
- 23. (c) Phil Sellens, some rights reserved (CC BY)
- 24. (c) Boris Bolshakov, some rights reserved (CC BY-NC), uploaded by Boris Bolshakov
- 25. (c) Mike V.A. Burrell, some rights reserved (CC BY-NC), uploaded by Mike V.A. Burrell
- 26. (c) Alinja, some rights reserved (CC BY-SA)
- 27. (c) Bas Kers, some rights reserved (CC BY-NC-SA)
- 28. (c) Dendroica cerulea, some rights reserved (CC BY), uploaded by Dendroica cerulea
- 29. (c) Rob Curtis, some rights reserved (CC BY-NC-SA), uploaded by Rob Curtis
- 30. (c) Erutuon, some rights reserved (CC BY-SA)
- 31. (c) Leo Papandreou, some rights reserved (CC BY-NC-SA)
- 32. (c) Bastiaan, some rights reserved (CC BY-NC-ND)
- 33. (c) mmwm, some rights reserved (CC BY-NC-ND)
- 34. (c) Sam Thomas, some rights reserved (CC BY-NC-SA)
- 35. (c) cassi saari, some rights reserved (CC BY-NC), uploaded by cassi saari
- 36. (c) Superior National Forest, some rights reserved (CC BY)
- 37. (c) Peter Gorman, some rights reserved (CC BY-NC-SA)
- 38. (c) eknuth, some rights reserved (CC BY-NC), uploaded by eknuth
- 39. (c) Marion Anthonisen, some rights reserved (CC BY-NC), uploaded by Marion Anthonisen
- 40. (c) Eric Guimbard, some rights reserved (CC BY-NC-SA)
- 41. (c) John Hilty, some rights reserved (CC BY-NC)
- 42. (c) Daniel Carter, all rights reserved, uploaded by Daniel Carter
- 43. (c) James Gaither, some rights reserved (CC BY-NC-ND)
- 44. (c) botany08, some rights reserved (CC BY), uploaded by botany08
- 45. (c) Bob Heitzman, some rights reserved (CC BY-NC), uploaded by Bob Heitzman
- 46. (c) C. E. Timothy Paine, some rights reserved (CC BY-NC)
- 47. (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick
- 48. (c) Julia Housden Proulx, some rights reserved (CC BY-NC), uploaded by Julia Housden Proulx
- 49. (c) kevinhintsa, some rights reserved (CC BY-NC), uploaded by kevinhintsa
- 50. (c) Richard Droker, some rights reserved (CC BY-NC-ND)
- 51. (c) Dan Mullen, some rights reserved (CC BY-NC-ND)
- 52. (c) Timothy Valentine, some rights reserved (CC BY-NC-SA)
- 53. (c) Anthony Mendoza, some rights reserved (CC BY-NC-SA)
- 54. (c) Сергей, some rights reserved (CC BY-NC), uploaded by Сергей
- 55. (c) Ron Edwards, some rights reserved (CC BY-NC), uploaded by Ron Edwards
- 56. (c) Sheldrake1, some rights reserved (CC BY-NC-SA)
- 57. (c) Charlotte Bill, some rights reserved (CC BY-NC), uploaded by Charlotte Bill
- 58. (c) Bear Paw Battlefield, some rights reserved (CC BY-NC-ND)
- 59. (c) Bas Kers (NL), some rights reserved (CC BY-NC-SA)
- 60. (c) Frank Mayfield, some rights reserved (CC BY-SA)
- 61. (c) Patrick Alexander, some rights reserved (CC BY-NC-ND)
- 62. (c) Lindley Ashline, some rights reserved (CC BY-NC)
- 63. (c) Kerry Woods, some rights reserved (CC BY-NC-ND)
- 64. (c) Mark Nenadov, some rights reserved (CC BY-NC), uploaded by Mark Nenadov
- 65. (c) Arthur Chapman, some rights reserved (CC BY-NC-SA)
- 66. (c) Joanne Redwood, some rights reserved (CC BY-NC), uploaded by Joanne Redwood
- 67. (c) M. Goff, some rights reserved (CC BY-NC-SA), uploaded by M. Goff
- 68. (c) Andy Fyon, some rights reserved (CC BY-NC), uploaded by Andy Fyon
- 69. (c) Thomas Koffel, some rights reserved (CC BY-NC), uploaded by Thomas Koffel
- 70. (c) forestlab, some rights reserved (CC BY-NC), uploaded by forestlab
- 71. (c) David Badke, some rights reserved (CC BY-SA), uploaded by David Badke
- 72. (c) Amadej Trnkoczy, some rights reserved (CC BY-NC-SA)
- 73. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 74. (c) Andreas Rockstein, some rights reserved (CC BY-SA)
- 75. (c) randomtruth, some rights reserved (CC BY-NC-SA)
- 76. (c) HermannFalkner/sokol, some rights reserved (CC BY-NC)
- 77. (c) dogtooth77, some rights reserved (CC BY-NC-SA)
- 78. (c) Hermann Falkner, some rights reserved (CC BY-NC)
- 79. (c) Erin Faulkner, some rights reserved (CC BY-NC), uploaded by Erin Faulkner
- 80. (c) Joe Bartok, some rights reserved (CC BY-NC), uploaded by Joe Bartok
- 81. (c) Fred Melgert / Carla Hoegen, some rights reserved (CC BY-NC), uploaded by Fred Melgert / Carla Hoegen
- 82. (c) Pete Woodall, some rights reserved (CC BY-NC), uploaded by Pete Woodall
- 83. (c) 116916927065934112165, some rights reserved (CC BY-SA), uploaded by 116916927065934112165
- 84. (c) judith holm, some rights reserved (CC BY-NC-ND), uploaded by judith holm
- 85. (c) John B., some rights reserved (CC BY)
- 86. (c) Kingsbrae Garden, some rights reserved (CC BY-NC-SA)
- 87. (c) Dorota (Dorothy), some rights reserved (CC BY-SA)
- 88. (c) Joshua Mayer, some rights reserved (CC BY-SA)
- 89. (c) Mallory S., some rights reserved (CC BY-NC), uploaded by Mallory S.
- 90. (c) Carol Blaney, some rights reserved (CC BY-NC), uploaded by Carol Blaney
- 91. (c) Nikolai Vladimirov, some rights reserved (CC BY-NC), uploaded by Nikolai Vladimirov
- 92. (c) Robert D Stevenson, some rights reserved (CC BY-NC), uploaded by Robert D Stevenson
- 93. (c) Mateo Hernandez Schmidt, some rights reserved (CC BY-NC-SA), uploaded by Mateo Hernandez Schmidt
- 94. (c) Andrey Zharkikh, some rights reserved (CC BY)
- 95. (c) Charles Wohlers, some rights reserved (CC BY-NC-ND)
- 96. (c) Cindy Kilpatrick, some rights reserved (CC BY)
- 97. (c) Owen Clarkin, some rights reserved (CC BY-NC), uploaded by Owen Clarkin
- 98. (c) Samuel Brinker, some rights reserved (CC BY-NC), uploaded by Samuel Brinker
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