Edited by Laura Arnow, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Michał Brzeziński, some rights reserved (CC BY-NC), uploaded by Michał Brzeziński
- 2. (c) Manuel Raab, some rights reserved (CC BY-NC), uploaded by Manuel Raab
- 3. (c) Tom Benson, some rights reserved (CC BY-NC-ND)
- 4. no rights reserved, uploaded by Jesse Rorabaugh
- 5. (c) richardjaybee, some rights reserved (CC BY-NC), uploaded by richardjaybee
- 6. (c) Diana-Terry Hibbitts, some rights reserved (CC BY-NC), uploaded by Diana-Terry Hibbitts
- 7. (c) Sean McCann, some rights reserved (CC BY-NC-SA)
- 8. (c) John Wright, some rights reserved (CC BY-NC-ND)
- 9. (c) Jenn Forman Orth, some rights reserved (CC BY-NC-SA)
- 10. (c) Laura Gaudette, some rights reserved (CC BY), uploaded by Laura Gaudette
- 11. (c) C. Mallory, some rights reserved (CC BY-NC), uploaded by C. Mallory
- 12. (c) Paolo Mazzei, some rights reserved (CC BY-NC), uploaded by Paolo Mazzei
- 13. (c) skitterbug, some rights reserved (CC BY), uploaded by skitterbug
- 14. (c) BJ Stacey, some rights reserved (CC BY-NC), uploaded by BJ Stacey
- 15. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 16. (c) Royal Tyler, some rights reserved (CC BY-NC-SA), uploaded by Royal Tyler
- 17. (c) bwood708, some rights reserved (CC BY-NC), uploaded by bwood708
- 18. (c) fam-esquivel, some rights reserved (CC BY-NC)
- 19. (c) Kimberlie Sasan, some rights reserved (CC BY-ND), uploaded by Kimberlie Sasan
- 20. (c) Henrik Kibak, some rights reserved (CC BY), uploaded by Henrik Kibak
- 21. (c) Gilles San Martin, some rights reserved (CC BY-SA), uploaded by Gilles San Martin
- 22. (c) Mary Keim, some rights reserved (CC BY-NC-SA)
- 23. (c) Judy Gallagher, some rights reserved (CC BY)
- 24. (c) Ken-ichi Ueda, some rights reserved (CC BY), uploaded by Ken-ichi Ueda
- 25. (c) Ilona L, some rights reserved (CC BY-NC-SA)
- 26. (c) Lauren Sobkoviak, some rights reserved (CC BY-NC-ND)
- 27. (c) Edward Perry IV, some rights reserved (CC BY-NC), uploaded by Edward Perry IV
- 28. (c) Gordon Karre, some rights reserved (CC BY-NC), uploaded by Gordon Karre
- 29. (c) Rose Ludwig, some rights reserved (CC BY-NC), uploaded by Rose Ludwig
- 30. (c) kaseyfoley, some rights reserved (CC BY-NC), uploaded by kaseyfoley
- 31. (c) photojuls, some rights reserved (CC BY-NC)
- 32. (c) Sam, some rights reserved (CC BY-NC), uploaded by Sam
- 33. (c) Cat Chang, some rights reserved (CC BY-NC), uploaded by Cat Chang
- 34. (c) Michael Warner, some rights reserved (CC BY), uploaded by Michael Warner
- 35. (c) Robin Gwen Agarwal, some rights reserved (CC BY-NC), uploaded by Robin Gwen Agarwal
- 36. (c) Kerry Givens, some rights reserved (CC BY-NC), uploaded by Kerry Givens
- 37. (c) Cameron Eckert, some rights reserved (CC BY-NC), uploaded by Cameron Eckert
- 38. (c) Anders Illum, some rights reserved (CC BY-NC-ND)
- 39. (c) Katja Schulz, some rights reserved (CC BY)
- 40. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 41. (c) dL thompson, some rights reserved (CC BY-NC-ND), uploaded by dL thompson
- 42. (c) Stefan, some rights reserved (CC BY-NC), uploaded by Stefan
- 43. (c) George Roark, some rights reserved (CC BY-NC), uploaded by George Roark
- 44. no rights reserved, uploaded by Robb Hannawacker
- 45. (c) Lupoli Roland, some rights reserved (CC BY-NC), uploaded by Lupoli Roland
- 46. (c) joannerusso, some rights reserved (CC BY-NC), uploaded by joannerusso
- 47. (c) Jason M Crockwell, some rights reserved (CC BY-NC-ND), uploaded by Jason M Crockwell
- 48. (c) Karen Yukich, some rights reserved (CC BY-NC), uploaded by Karen Yukich
- 49. (c) Ken-ichi Ueda, some rights reserved (CC BY-NC-SA)
- 50. (c) Patrick Coin, some rights reserved (CC BY-NC-SA)
- 51. (c) Christian Schwarz, some rights reserved (CC BY-NC), uploaded by Christian Schwarz
- 52. (c) Anne Toal, some rights reserved (CC BY)
- 53. (c) Corinna Herr, some rights reserved (CC BY-NC), uploaded by Corinna Herr
- 54. (c) Karlyn H. Lewis, some rights reserved (CC BY-NC), uploaded by Karlyn H. Lewis
- 55. (c) Ryszard, some rights reserved (CC BY-NC)
- 56. (c) Don Loarie, some rights reserved (CC BY)
- 57. (c) Andrea Kreuzhage, some rights reserved (CC BY-NC), uploaded by Andrea Kreuzhage
- 58. (c) James Bailey, some rights reserved (CC BY-NC), uploaded by James Bailey
- 59. (c) pnw_jessi, some rights reserved (CC BY-NC)
- 60. (c) Robert, some rights reserved (CC BY-NC)
- 61. (c) Kuoni W, some rights reserved (CC BY-NC), uploaded by Kuoni W
- 62. (c) Jimmy Smith, some rights reserved (CC BY-NC-ND)
- 63. (c) Jim Johnson, some rights reserved (CC BY-NC-ND), uploaded by Jim Johnson
- 64. (c) vespidmacro, some rights reserved (CC BY-NC), uploaded by vespidmacro
- 65. (c) Franco Folini, some rights reserved (CC BY)
- 66. (c) guyincognito, some rights reserved (CC BY-NC), uploaded by guyincognito
- 67. (c) tca12345, some rights reserved (CC BY-NC), uploaded by tca12345
- 68. (c) Franco Folini, some rights reserved (CC BY-SA)
- 69. (c) hobiecat, some rights reserved (CC BY-NC), uploaded by hobiecat
- 70. (c) Judy Gallagher, some rights reserved (CC BY-SA), uploaded by Judy Gallagher
- 71. (c) Anne MS, some rights reserved (CC BY-NC-SA)
- 72. (c) David Hill, some rights reserved (CC BY)
- 73. (c) Thomas Barbin, some rights reserved (CC BY-NC), uploaded by Thomas Barbin
- 74. (c) David Hofmann, some rights reserved (CC BY-NC-ND)
- 75. (c) Thomas Shahan, some rights reserved (CC BY-NC), uploaded by Thomas Shahan
- 76. (c) blcomegys, some rights reserved (CC BY-NC), uploaded by blcomegys
- 77. (c) Carrie Seltzer, some rights reserved (CC BY-NC), uploaded by Carrie Seltzer
- 78. (c) Logan Crees, some rights reserved (CC BY-NC), uploaded by Logan Crees
- 79. (c) Riley Walsh, some rights reserved (CC BY-NC), uploaded by Riley Walsh
- 80. (c) R.J. Adams, some rights reserved (CC BY-NC), uploaded by R.J. Adams
- 81. (c) PaulS, some rights reserved (CC BY-NC), uploaded by PaulS
- 82. (c) Eric Running, some rights reserved (CC BY-NC), uploaded by Eric Running
- 83. (c) Ken-ichi Ueda, some rights reserved (CC BY)
- 84. (c) Ken Butler, some rights reserved (CC BY-NC), uploaded by Ken Butler
- 85. (c) bob15noble, some rights reserved (CC BY-NC), uploaded by bob15noble
- 86. (c) bevlynn99, some rights reserved (CC BY-NC)
- 87. (c) Roger Rittmaster, some rights reserved (CC BY-NC), uploaded by Roger Rittmaster