ILLUSTRATIONS 



Overpowering Curiosity of a Mountain Sheep .... Frontispiece 



Christmas at the Primates' House Facing page 42 



The Trap-Door Spider's Door and Burrow ... " 46 



Hanging Nest of the Baltimore Oriole ....". 64 



Great Hanging Nests of the Crested Cacique ... " 64 



"Rajah," the Actor Orang-Utan " 76 



Thumb-Print of an Orang-Utan " 76 



The Lever That Our Orang-Utan Invented Page 78 



Portrait of a High-Caste Chimpanzee .... Facing page 84 



The Gorilla With the Wonderful Mind .... " 98 



Tame Elephants Assisting in Tying a Wild Captive . no 



Wild Bears Quickly Recognize Protection .... " 130 



Alaskan Brown Bear, "Ivan," Begging for Food . . " 134 



The Mystery of Death " 134 



The Steady-Nerved and Courageous Mountain Goat 152 



Fortress of an Arizona Pack-Rat Page 164 



Wild Chipmunks Respond to Man's Protection . . Facing page 166 



An Opossum Feigning Death 166 



Migration of the Golden Plover. (Map) Page 172 



Remarkable Village Nests of the Sociable Weaver Bird Facing page 182 



Spotted Bower-Bird, at Work on Its Unfinished Bower " 184 



ix 



