3 2 4 



INDEX 



217; voices, 32; with organ-grind- 

 ers, 53, 62. 



Monogamy, in chimpanzee, 222. 



Moose, 38, 59; courage, 250. 



Morals of human race, 219; of wild 

 I animals, 219. 



Motherhood, law of wild animals re- 

 garding, 227; period of, among deer, 

 250. 



Mother love, in wild animals, 250. 



Mouse, white-footed, intelligence, 

 160. 



Muir, John, 147. 



Mule deer, escapes from puma, 278; 

 female, murdered by mate, 289; 

 Max Sieber's story of, 155; temper- 

 ament of, 18. 



Murder, by mink and weasel, 295; by 

 various birds, 299; by wolves, 223; 

 of female jaguar, 290; of female 

 mule deer, 288; of female polar 

 bear, 293; of polar bear cubs, 291; 

 rarely committed by reptiles, 299. 



Murre, 183. 



Musk-ox, courage, 252 ; defensive cir- 

 cle, 253; strategy, 53. 



Muskrat, round-tailed, 169. 



MustelidcB, 295. 



Mustelines, temperament, 17. 



Mynahs, 187. 



N 



Naja tripudians, 195. 

 Nasalis larvatus, 30. 

 Nasua, 19. 



"Nature of Animals, The," 118. 

 Neofiber atteni, 169. 

 Neotoma, 42. 



Neotoma albigula, 162, 163. 

 Nesting habits of rabbit, 58. 

 Nests of cacique, 64; oriole, 63; wasps, 

 64, weaver birds, 65. 



Obedience, law of, 228. 



Ochotona princeps, 166. 



Okapi, 158. 



Opuntia fulgida, 164. 



Orang-utan, article on, by L. A. 



Camacho, 80; caste, 208; compara- 

 tive intelligence, 41, 42; discovery 

 and use of lever by "Dohong," 77- 

 80; disposition in captivity, 73; ex- 

 periments with, by Dr. R. M. 

 Yerkes, 81; facial expression, 83; 

 fighting methods, 272; jungle speci- 

 mens, 70; mental status, 72; meth- 

 ods of attack, 311; performance by 

 "Rajah," 75, 76; performances in 

 public, 75; play, 236; temperament, 

 x 5» 73; temperamental differences 

 between chimpanzee and, 71, 72; 

 training possibilities, 74, 75; voice, 

 27* 71, 84. 



Organ-grinders, monkeys with, 53, 62. 



Oriole, Baltimore, nest of, 63, 182. 



Osborn, Prof. Henry Fairfield, 160. 



Otter, playfulness on slide, 259. 



"Outdoor Life" Magazine, 150. 



Ovis nelsoni, 151. 



Pack rat, 42, 162; fortress, 164. 



Palmer, George, keeper, 313. 



Panel torn out by bear, 131. 



Parasitic nesting habits, 188. 



Parrots, talking by, 187. 



Passer domesticus, 191. 



Pastimes of animals (see Play). 



Patagonia, 66. 



Patterson, Col. J. H., 244. 



Peace promotes happiness, 222. 



Peccary, courage, 254. 



Pelicans, brown, killed by trumpeter 

 swans, 284. 



Penguins, antarctic, primitive cour- 

 age, 267. 



Pennsylvania, rabbits in, 58, 167. 



Penny, Major R., owner of "John 

 Gorilla," 15, 84, 93. 



Performances, ethics of, 205 ; of chim- 

 panzees, 85, 86; of horses, 214; of 

 orang-utans, 75, 76; of sea-lions, 

 212; opposition to, 205; "trick," 

 212. 



Peromyscus leticopis, 160. 



Pet bears, denounced, 126; deer, 18. 



"Peter," chimpanzee, 82; initiative, 



