Photos:
- 1. (c) Paul Cook, some rights reserved (CC BY-NC-ND), uploaded by Paul Cook
- 2. (c) Brian Starzomski, some rights reserved (CC BY-NC), uploaded by Brian Starzomski
- 3. (c) Carlos G Velazco-Macias, some rights reserved (CC BY-NC), uploaded by Carlos G Velazco-Macias
- 4. (c) Douglas Goldman, some rights reserved (CC BY), uploaded by Douglas Goldman
- 5. (c) Emma Harrower, some rights reserved (CC BY-NC)
- 6. (c) Alexis, some rights reserved (CC BY), uploaded by Alexis
- 7. (c) Leigh Torrence, some rights reserved (CC BY-NC), uploaded by Leigh Torrence
- 8. (c) Romain Dupraz, some rights reserved (CC BY-NC-ND), uploaded by Romain Dupraz
- 9. (c) Alexander Görlt, some rights reserved (CC BY-NC), uploaded by Alexander Görlt
- 10. (c) Belinda Lo, some rights reserved (CC BY-NC-SA)
- 11. (c) Irina Mitjushina, some rights reserved (CC BY-NC), uploaded by Irina Mitjushina
- 12. (c) jerry52, some rights reserved (CC BY-NC), uploaded by jerry52
- 13. (c) Ken Potter, some rights reserved (CC BY-NC), uploaded by Ken Potter
- 14. (c) Neil Gilham, some rights reserved (CC BY-NC), uploaded by Neil Gilham
- 15. (c) Chloe and Trevor Van Loon, some rights reserved (CC BY-NC), uploaded by Chloe and Trevor Van Loon
- 16. (c) Kerry Woods, some rights reserved (CC BY-NC-ND)
- 17. (c) Todd Ramsden, some rights reserved (CC BY-NC), uploaded by Todd Ramsden
- 18. (c) Martin Rader, some rights reserved (CC BY-NC), uploaded by Martin Rader
- 19. (c) J Brew, some rights reserved (CC BY-SA), uploaded by J Brew
- 20. (c) Susan Elliott, some rights reserved (CC BY-NC), uploaded by Susan Elliott
- 21. (c) Ed Alverson, some rights reserved (CC BY), uploaded by Ed Alverson
- 22. no rights reserved, uploaded by Craig Martin
- 23. (c) Torsten Eriksson, some rights reserved (CC BY-NC), uploaded by Torsten Eriksson
- 24. (c) Don Loarie, some rights reserved (CC BY), uploaded by Don Loarie
- 25. (c) CK Kelly, some rights reserved (CC BY), uploaded by CK Kelly
- 26. (c) Stan Shebs, some rights reserved (CC BY-SA)
- 27. (c) Ricarda Bergen, some rights reserved (CC BY-NC), uploaded by Ricarda Bergen
- 28. (c) Rob Curtis, some rights reserved (CC BY-NC-SA), uploaded by Rob Curtis
- 29. (c) Jeff Skrentny, some rights reserved (CC BY-NC), uploaded by Jeff Skrentny
- 30. (c) J.R.M., some rights reserved (CC BY-NC-SA)
- 31. (c) Claire O'Neill, some rights reserved (CC BY-NC), uploaded by Claire O'Neill
- 32. (c) Melissa McMasters, some rights reserved (CC BY)
- 33. (c) Pat Enright, some rights reserved (CC BY-NC), uploaded by Pat Enright
- 34. (c) José Belem Hernández Díaz, some rights reserved (CC BY), uploaded by José Belem Hernández Díaz
- 35. (c) Michael J. Oldham, some rights reserved (CC BY-NC), uploaded by Michael J. Oldham
- 36. (c) ellen hildebrandt, some rights reserved (CC BY-NC), uploaded by ellen hildebrandt
- 37. (c) sfitzgerald86, some rights reserved (CC BY-NC), uploaded by sfitzgerald86
- 38. (c) chummymeg, some rights reserved (CC BY-NC), uploaded by chummymeg
- 39. (c) Northcut, some rights reserved (CC BY), uploaded by Northcut
- 40. (c) Rob Palmer, some rights reserved (CC BY-NC-SA), uploaded by Rob Palmer
- 41. no rights reserved, uploaded by Laura Holloway
- 42. (c) Martin Lowry, some rights reserved (CC BY-NC), uploaded by Martin Lowry
- 43. (c) Frank Mayfield, some rights reserved (CC BY-SA)
- 44. (c) Matt Lavin, some rights reserved (CC BY-SA)
- 45. (c) Paul Norwood, some rights reserved (CC BY-NC), uploaded by Paul Norwood
- 46. (c) Amadej Trnkoczy, some rights reserved (CC BY-NC-SA)
- 47. (c) Juniperus_scopulorum, some rights reserved (CC BY-NC)
- 48. (c) Sarah Vinge-Mazer, some rights reserved (CC BY-NC-SA), uploaded by Sarah Vinge-Mazer
- 49. (c) kilasiak, some rights reserved (CC BY-NC), uploaded by kilasiak
- 50. (c) Hörður Kristinsson, some rights reserved (CC BY-NC)
- 51. no rights reserved, uploaded by Carrie Brown
- 52. (c) Jason Hollinger, some rights reserved (CC BY)
- 53. (c) Andreas Balzer, some rights reserved (CC BY-NC-SA)
- 54. (c) Thayne Tuason, some rights reserved (CC BY-NC)
- 55. (c) ashley BALSAM baz, some rights reserved (CC BY)
- 56. (c) Pat Deacon, some rights reserved (CC BY-NC), uploaded by Pat Deacon
- 57. (c) 2009 Keir Morse, some rights reserved (CC BY-NC-SA)
- 58. (c) 2006 Steve Matson, some rights reserved (CC BY-NC)
- 59. (c) Susan Panjabi, some rights reserved (CC BY-NC), uploaded by Susan Panjabi
- 60. (c) Charles Thomas Hash, Jr., some rights reserved (CC BY-NC-ND), uploaded by Charles Thomas Hash, Jr.
- 61. (c) Hermann Falkner, some rights reserved (CC BY-NC)
- 62. (c) Bryant Olsen, some rights reserved (CC BY-NC)
- 63. (c) Dane Larsen, some rights reserved (CC BY-NC)
- 64. (c) Mitch from Costa Mesa, CA, USA, some rights reserved (CC BY-SA)
- 65. (c) Alex Abair, some rights reserved (CC BY-NC), uploaded by Alex Abair
- 66. (c) Mart Hughes, some rights reserved (CC BY-NC), uploaded by Mart Hughes
- 67. (c) anonymous, some rights reserved (CC BY-SA)
- 68. (c) Lindsey K. Wise, some rights reserved (CC BY), uploaded by Lindsey K. Wise
- 69. (c) Yushan Tong, some rights reserved (CC BY-NC), uploaded by Yushan Tong
- 70. (c) Peter Stevens from Seattle, some rights reserved (CC BY)
- 71. (c) bio3leen, some rights reserved (CC BY-NC), uploaded by bio3leen
- 72. (c) Ricky Taylor, some rights reserved (CC BY-NC), uploaded by Ricky Taylor
- 73. (c) rhysspinner, some rights reserved (CC BY-NC), uploaded by rhysspinner
- 74. (c) Benny Mazur, some rights reserved (CC BY)
- 75. (c) Radio Tonreg, some rights reserved (CC BY)
- 76. (c) Colin Murray, some rights reserved (CC BY-NC), uploaded by Colin Murray
- 77. (c) Kingsbrae Garden, some rights reserved (CC BY-NC-SA)
- 78. (c) Mountain Partnership at FAO, some rights reserved (CC BY-NC)
- 79. (c) Sepehr Ehsani, some rights reserved (CC BY-NC-ND)
- 80. (c) TCDavis, some rights reserved (CC BY-NC-ND)
- 81. (c) ugraland, some rights reserved (CC BY)
- 82. (c) C. Mallory, some rights reserved (CC BY-NC), uploaded by C. Mallory
- 83. (c) Jenny Smith, some rights reserved (CC BY-NC), uploaded by Jenny Smith
- 84. (c) Ken-ichi Ueda, some rights reserved (CC BY)
- 85. (c) aarongunnar, some rights reserved (CC BY), uploaded by aarongunnar
- 86. (c) evening, some rights reserved (CC BY-NC), uploaded by evening
- 87. (c) Joshua Mayer, some rights reserved (CC BY-SA)
- 88. (c) lonnyholmes, some rights reserved (CC BY-NC), uploaded by lonnyholmes
- 89. (c) Carol Jacobs-Carre, some rights reserved (CC BY-NC-ND)
- 90. (c) Jamie Anderson, some rights reserved (CC BY-NC-ND)
- 91. (c) Lynette Schimming, some rights reserved (CC BY-NC)
- 92. (c) Clayton D'Orsay, some rights reserved (CC BY-NC), uploaded by Clayton D'Orsay
- 93. Nadiatalent, no known copyright restrictions (public domain)
- 94. (c) Donna, some rights reserved (CC BY-ND)
- 95. (c) Dan Mullen, some rights reserved (CC BY-NC-ND)
- 96. (c) Superior National Forest, some rights reserved (CC BY)
- 97. (c) scottmo, some rights reserved (CC BY-NC), uploaded by scottmo
- 98. (c) Anthony Mendoza, some rights reserved (CC BY-NC-SA)
- 99. (c) JanetandPhil, some rights reserved (CC BY-NC-ND)
- 100. (c) Ferran Turmo Gort, some rights reserved (CC BY-NC-SA)
- 101. (c) David Bygott, some rights reserved (CC BY-NC-SA)
- 102. (c) Damon Tighe, some rights reserved (CC BY-NC), uploaded by Damon Tighe
- 103. (c) Peggy Lyon, some rights reserved (CC BY-NC), uploaded by Peggy Lyon
- 104. (c) Tom Hilton, some rights reserved (CC BY)
- 105. (c) Andrey Zharkikh, some rights reserved (CC BY)
- 106. (c) Allison Del Gizzi, some rights reserved (CC BY-NC), uploaded by Allison Del Gizzi
- 107. (c) 2006 James Morefield, some rights reserved (CC BY-NC-SA)
- 108. (c) 2012 Gary A. Monroe, some rights reserved (CC BY-NC)
- 109. (c) Alexandre Dell'Olivo, some rights reserved (CC BY-NC-SA)
- 110. (c) Vincent Scheidt, some rights reserved (CC BY-NC), uploaded by Vincent Scheidt
- 111. (c) James Bailey, some rights reserved (CC BY-NC), uploaded by James Bailey
- 112. (c) Jörg Hempel, some rights reserved (CC BY-SA)
- 113. (c) Joe Decruyenaere, some rights reserved (CC BY-SA)
- 114. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 115. (c) 2010 Zoya Akulova, some rights reserved (CC BY-NC)
- 116. (c) Nathan Taylor, some rights reserved (CC BY-NC), uploaded by Nathan Taylor
- 117. (c) Benjamin J. Dion, some rights reserved (CC BY-NC-SA), uploaded by Benjamin J. Dion
- 118. (c) JDavid, some rights reserved (CC BY-SA)
- 119. (c) "USDI BLM. United States, CA, Mono Co. October 2003.", some rights reserved (CC BY-NC-SA)
- 120. (c) Ron Marusak, some rights reserved (CC BY-NC), uploaded by Ron Marusak
- 121. (c) jscior28, some rights reserved (CC BY-NC)
- 122. (c) cjosefson, some rights reserved (CC BY-NC), uploaded by cjosefson
- 123. (c) TreesOfTheWorld.net, some rights reserved (CC BY-NC-SA)
- 124. (c) Cullen Hanks, some rights reserved (CC BY-NC), uploaded by Cullen Hanks
- 125. (c) Cheryl Beyer, some rights reserved (CC BY-NC), uploaded by Cheryl Beyer
- 126. (c) Tim Haynes, some rights reserved (CC BY-NC-ND)
- 127. (c) J. N. Stuart, all rights reserved, uploaded by J. N. Stuart
- 128. (c) kqedquest, some rights reserved (CC BY-NC)
- 129. (c) John Hilty, some rights reserved (CC BY-NC)
- 130. (c) MurielBendel, some rights reserved (CC BY-SA)
- 131. (c) Biodiversity Heritage Library, some rights reserved (CC BY-NC-SA)
- 132. (c) Biopix, some rights reserved (CC BY-NC)
- 133. (c) lahvak, some rights reserved (CC BY-NC-SA)
- 134. (c) jozien, some rights reserved (CC BY-NC), uploaded by jozien
- 135. (c) 葉子, some rights reserved (CC BY-NC), uploaded by 葉子
- 136. (c) James Gaither, some rights reserved (CC BY-NC-ND)
- 137. Jim Pisarowicz, no known copyright restrictions (public domain)
- 138. (c) nancyb, some rights reserved (CC BY-NC)
- 139. (c) Leo Papandreou, some rights reserved (CC BY-NC-SA)
- 140. (c) autan, some rights reserved (CC BY-NC-ND)
- 141. (c) Arthur Chapman, some rights reserved (CC BY)
- 142. (c) faerthen, some rights reserved (CC BY-NC), uploaded by faerthen
- 143. (c) 2014 Zoya Akulova, some rights reserved (CC BY-NC)
- 144. (c) Doug Waylett, some rights reserved (CC BY)
- 145. (c) sgarcia64, some rights reserved (CC BY-NC)
- 146. (c) Simon Kingston, some rights reserved (CC BY-NC), uploaded by Simon Kingston
- 147. (c) Bruce Bennett, some rights reserved (CC BY-NC), uploaded by Bruce Bennett
- 148. (c) Charlie Hohn, some rights reserved (CC BY), uploaded by Charlie Hohn
- 149. no rights reserved, uploaded by Robb Hannawacker
- 150. no rights reserved, uploaded by Patrick Alexander
- 151. (c) David McCorquodale, some rights reserved (CC BY), uploaded by David McCorquodale
- 152. (c) David Greenberger, some rights reserved (CC BY-NC-ND), uploaded by David Greenberger
- 153. (c) Matt Lavin from Bozeman, Montana, USA, some rights reserved (CC BY-SA)
- 154. (c) Arqui Dal, some rights reserved (CC BY-NC), uploaded by Arqui Dal
- 155. (c) michiganwillie, some rights reserved (CC BY-NC), uploaded by michiganwillie
- 156. (c) Jim Morefield, some rights reserved (CC BY)
- 157. (c) Jeannette Warnert, some rights reserved (CC BY-NC), uploaded by Jeannette Warnert
- 158. (c) Brent Miller, some rights reserved (CC BY-NC-ND)
- 159. (c) Steve Ganley, some rights reserved (CC BY-NC), uploaded by Steve Ganley
- 160. (c) Megan Weber, some rights reserved (CC BY-NC), uploaded by Megan Weber
- 161. (c) Joshua Smith, some rights reserved (CC BY-NC), uploaded by Joshua Smith
- 162. (c) Nick Beck, some rights reserved (CC BY-NC-SA)
- 163. (c) Christopher Tracey, some rights reserved (CC BY-NC-SA), uploaded by Christopher Tracey
- 164. (c) Petr Filippov, some rights reserved (CC BY-SA)
- 165. no rights reserved, uploaded by Kent McFarland
- 166. (c) bathyporeia, some rights reserved (CC BY-NC-SA)
- 167. (c) Stefan.lefnaer, some rights reserved (CC BY-SA)
- 168. (c) Hilbert Buist, some rights reserved (CC BY-NC-SA)
- 169. (c) beautifulcataya, some rights reserved (CC BY-NC-ND)
- 170. (c) zen Sutherland, some rights reserved (CC BY-NC-SA)
- 171. (c) Bas Kers, some rights reserved (CC BY-NC-SA)
- 172. (c) Jose Luis Leon de la Luz, some rights reserved (CC BY-NC), uploaded by Jose Luis Leon de la Luz
- 173. (c) Samuel Brinker, some rights reserved (CC BY-NC), uploaded by Samuel Brinker
- 174. (c) dogtooth77, some rights reserved (CC BY-NC-SA)
- 175. (c) Smithsonian Institution, National Museum of Natural History, Department of Botany, some rights reserved (CC BY-NC-SA)
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