Edited by Alex Lamoreaux, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) John Brush, some rights reserved (CC BY-NC), uploaded by John Brush
- 2. (c) Ad Konings, some rights reserved (CC BY-NC), uploaded by Ad Konings
- 3. (c) Art Mur, some rights reserved (CC BY-NC-ND), uploaded by Art Mur
- 4. (c) Tim Warfel, some rights reserved (CC BY-NC), uploaded by Tim Warfel
- 5. no rights reserved, uploaded by Glenn Berry
- 6. (c) texasturtles, some rights reserved (CC BY-NC), uploaded by texasturtles
- 7. (c) Michelle Herman, some rights reserved (CC BY-NC), uploaded by Michelle Herman
- 8. (c) Rich Kostecke, some rights reserved (CC BY-NC), uploaded by Rich Kostecke
- 9. (c) Pedro Peloso, some rights reserved (CC BY-NC), uploaded by Pedro Peloso
- 10. (c) Susan E Adams, some rights reserved (CC BY-SA)
- 11. (c) USFWS Mountain-Prairie, some rights reserved (CC BY)
- 12. (c) kenttrulsson, some rights reserved (CC BY-NC), uploaded by kenttrulsson
- 13. (c) Jean-Sébastien Chartier-Dumais, some rights reserved (CC BY-NC-SA), uploaded by Jean-Sébastien Chartier-Dumais
- 14. (c) Chris Bentley, some rights reserved (CC BY-NC), uploaded by Chris Bentley
- 15. (c) muzina_shanghai, some rights reserved (CC BY-NC-ND)
- 16. (c) unknownalloy, some rights reserved (CC BY-NC)
- 17. (c) Gabi Rusu, some rights reserved (CC BY-NC), uploaded by Gabi Rusu
- 18. (c) Avinash Bhagat, some rights reserved (CC BY-NC), uploaded by Avinash Bhagat
- 19. (c) Ouwesok, some rights reserved (CC BY-NC)
- 20. (c) Bureau of Land Management, some rights reserved (CC BY)
- 21. (c) Coronado Govaerts, some rights reserved (CC BY-NC), uploaded by Coronado Govaerts
- 22. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 23. (c) Kala Murphy King, some rights reserved (CC BY-NC-ND), uploaded by Kala Murphy King
- 24. (c) jefferykarafa, some rights reserved (CC BY-NC), uploaded by jefferykarafa
- 25. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 26. (c) lonnyholmes, some rights reserved (CC BY-NC), uploaded by lonnyholmes
- 27. (c) roy pilcher, some rights reserved (CC BY-NC), uploaded by roy pilcher
- 28. (c) Eduardo Axel Recillas Bautista, some rights reserved (CC BY-NC), uploaded by Eduardo Axel Recillas Bautista
- 29. (c) Lise Peterson, some rights reserved (CC BY-NC), uploaded by Lise Peterson
- 30. (c) bevlynn99, some rights reserved (CC BY-NC)
- 31. (c) David Alan Rogers, some rights reserved (CC BY-NC), uploaded by David Alan Rogers
- 32. (c) Edward Perry IV, some rights reserved (CC BY-NC), uploaded by Edward Perry IV
- 33. (c) Jeff O'Connell, some rights reserved (CC BY-NC), uploaded by Jeff O'Connell
- 34. (c) bob15noble, some rights reserved (CC BY-NC), uploaded by bob15noble
- 35. (c) Ken Butler, some rights reserved (CC BY-NC), uploaded by Ken Butler
- 36. (c) jackiebaum, some rights reserved (CC BY-NC), uploaded by jackiebaum
- 37. (c) Sonorabee, some rights reserved (CC BY-NC), uploaded by Sonorabee
- 38. (c) guyincognito, some rights reserved (CC BY-NC), uploaded by guyincognito
- 39. (c) Bill Bouton, some rights reserved (CC BY-NC-ND)
- 40. (c) Gilles San Martin, some rights reserved (CC BY-SA), uploaded by Gilles San Martin
- 41. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 42. (c) Royal Tyler, some rights reserved (CC BY-NC-SA), uploaded by Royal Tyler
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- 44. (c) skitterbug, some rights reserved (CC BY), uploaded by skitterbug
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- 46. (c) Ken Slade, some rights reserved (CC BY-NC)
- 47. (c) Mary Keim, some rights reserved (CC BY-NC-SA)
- 48. (c) fam-esquivel, some rights reserved (CC BY-NC)
- 49. (c) Derrick L. Mims, some rights reserved (CC BY-NC), uploaded by Derrick L. Mims
- 50. (c) Carlos A S Correia, some rights reserved (CC BY-NC), uploaded by Carlos A S Correia
- 51. (c) Cat Chang, some rights reserved (CC BY-NC), uploaded by Cat Chang
- 52. (c) Marshal Hedin, some rights reserved (CC BY-NC-SA), uploaded by Marshal Hedin
- 53. (c) George Keller, some rights reserved (CC BY-NC), uploaded by George Keller
- 54. (c) Roger Rittmaster, some rights reserved (CC BY-NC), uploaded by Roger Rittmaster
- 55. (c) Judy Gallagher, some rights reserved (CC BY-SA), uploaded by Judy Gallagher
- 56. (c) krancmm, some rights reserved (CC BY-NC), uploaded by krancmm
- 57. (c) C. Mallory, some rights reserved (CC BY-NC), uploaded by C. Mallory
- 58. (c) Jack Cochran, some rights reserved (CC BY-NC), uploaded by Jack Cochran
- 59. (c) Aaron Lincoln, some rights reserved (CC BY-NC), uploaded by Aaron Lincoln
- 60. (c) Royal Tyler, some rights reserved (CC BY-NC-SA)
- 61. (c) Andrea Kreuzhage, some rights reserved (CC BY-NC), uploaded by Andrea Kreuzhage
- 62. (c) Jeremy Collison, some rights reserved (CC BY-NC), uploaded by Jeremy Collison
- 63. (c) Missy McAllister-Kerr, some rights reserved (CC BY-NC), uploaded by Missy McAllister-Kerr
- 64. (c) Justin Williams, some rights reserved (CC BY), uploaded by Justin Williams
- 65. (c) Michael Bok, some rights reserved (CC BY-NC-SA)
- 66. (c) Cameron Eckert, some rights reserved (CC BY-NC), uploaded by Cameron Eckert
- 67. (c) e0n_, some rights reserved (CC BY-NC), uploaded by e0n_
- 68. (c) William J. Deml, some rights reserved (CC BY-NC), uploaded by William J. Deml
- 69. (c) alisonbabb, some rights reserved (CC BY-NC)
- 70. (c) Annika Lindqvist, some rights reserved (CC BY), uploaded by Annika Lindqvist
- 71. (c) lucio101, some rights reserved (CC BY-NC)
- 72. (c) Carlos G Velazco-Macias, some rights reserved (CC BY-NC), uploaded by Carlos G Velazco-Macias
- 73. (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick
- 74. (c) Gravitywave, some rights reserved (CC BY-NC-SA)
- 75. (c) Russ Hoverman, some rights reserved (CC BY-NC), uploaded by Russ Hoverman
- 76. (c) Matthew Allen, some rights reserved (CC BY-NC), uploaded by Matthew Allen
- 77. (c) Danny Barron, some rights reserved (CC BY-NC-ND)
- 78. (c) Leslie Cooper, some rights reserved (CC BY-NC), uploaded by Leslie Cooper
- 79. (c) Anna Livia Singer, some rights reserved (CC BY-NC-ND), uploaded by Anna Livia Singer
- 80. (c) Jane Kirkland, some rights reserved (CC BY-NC-ND)
- 81. (c) Tania Homayoun, some rights reserved (CC BY-NC-ND), uploaded by Tania Homayoun
- 82. (c) Alex Abair, some rights reserved (CC BY-NC), uploaded by Alex Abair
- 83. (c) Bob O'Kennon, some rights reserved (CC BY-NC), uploaded by Bob O'Kennon
- 84. (c) Alison Northup, some rights reserved (CC BY), uploaded by Alison Northup
- 85. (c) Linda Jo Conn, some rights reserved (CC BY-NC), uploaded by Linda Jo Conn
- 86. (c) George Afghan, some rights reserved (CC BY-NC), uploaded by George Afghan
- 87. (c) Robby Deans, some rights reserved (CC BY-NC), uploaded by Robby Deans
- 88. (c) Sue Carnahan, some rights reserved (CC BY), uploaded by Sue Carnahan
- 89. (c) Juan, some rights reserved (CC BY-NC), uploaded by Juan
- 90. (c) Eric Hunt, some rights reserved (CC BY-SA)
- 91. (c) Benjamin Durrington, some rights reserved (CC BY-NC-ND), uploaded by Benjamin Durrington