Источники иллюстраций

Cover-Painting by Herb Steinberg, background photograph by Dr. Edward S. Ross.

8 - Painting by Burt Silverman, background photograph by Alfred Eisenstaedt for LIFE.

13 - Map by Adolph E. Brotman.

16, 17 - Paper sculpture by Nicholas Fasciano, photographed by Ken Kay.

21 to 31 - Paintings by Burt Silverman, background photographs are listed separately.

21 - Pete Turner.

22, 23 - J. Alex Langley from D.P.L.; Emil Schulthess from Black Star

24, 25 - Pete Turner.

26, 27 - Maitland A. Edey.

28, 29 - Dale A. Zimmerman and Marian Zimmerman; Maitland A. Edey.

30, 31 - Constance Hess from Animals Animals.

32 - Michael Irwin courtesy Transvaal Museum, Pretoria, South Africa.

35 - Fritz Goro, Peabody Museum of Natural History, Yale University.

36 - Drawing by Adolph E. Brotman.

40, 41 - Fritz Goro, Peabody Museum of Natural History, Yale University.

42, 43 - Drawings by Susan Fox.

50 - Fritz Goro, Museum of Comparative Zoology. Harvard University.

54 to 62 - Paintings by Don Punchatz.

67 - John Reader for LIFE.

68 - Gordon W. Gahan, National Geographic Society.

69 - Dr. Roger С Wood.

70, 71 - John Reader for LIFE.

72, 73 - Dr. Roger С Wood.

74, 75 - Gerald G. Eck.

76, 77 - Frank Woehr from Photo Trends.

78 - Hugo van Lawick, National Geographic Society.

82, 83 - Designed by Jeheber and Peace, Inc. Illustrations by Robert Frost.

88 - Hugo van Lawick, National Geographic Society.

90 to 95 - Dr. Timothy W. Ransom.

98 - Hugo van Lawick, National Geographic Society.

99 - Dr. Timothy W. Ransom, National Geographis Society-Patrick P. McGinnis, National Geographic Society.

102 - Dr. Timothy W. Ransom, National Geographic Society, 106 - Maitland A. Edey.

110, 111, 112 - Drawings by Nicholas Fasciano.

113 - Alan Root.

114, 115 - Drawing by Nicholas Fasciano; Willard Price. 116-Drawing by Nicholas Fasciano.

117-Alan Root except top left, Hugo van Lawick.

122 to 125 - John Reader courtesy National Museums of Kenya.

128 - Leonard Wolfe courtesy Carnegie Institution. Washington, D.C.

132 - Designed by Jeheber and Peace, Inc. Illustrations by Robert Frost.

135 to 141 - Drawings by Adolph E. Brotman.

143 - Credits for this page appear on pages 144 to 149;

144 - Brian L.O'Connor; Gordon W. Gahan, National Geographic Society.

145 - Photograph by Robert M. Campbell © National Geographic Society; Michael Irwin; Dr. С. К. Brain.

146 - Cynthia Ellis; Margaret E. Donnelly; Ted Streshinsky. 147 - John Reader for LIFE; Kay Schaller.

148 - From In the Shadow of Man, by Jane van Lawick-Goodall. Photographs by Hugo van Lawick. Copyright © 1971 by Hugo and Jane van Lawick-Goodall. Reprinted by permission of Houghton Mifflin Company; Gordon W. Gahan, National Geographic Society.

149 - Enrico Ferorelli; Courtesy Professor G.H.R. von Koenigswald; Dr. George Mross.