INDEX 



Abdomen, size and secondary use 

 of, in young, 220 



Accessories, or bird-photographer's 

 outfit, enumerated, 71 



Alarm calls, in House Wren, 39 ; 

 in Great Herring Gull, 55; in 

 Catbird, 122; in Robin, 223; ef- 

 fect of, upon birds of other spe- 

 cies, 224 



Allantois, or respiratory sac, eaten 

 by Gull, 173 



Allen, Charles A., 218 



Alligator, nest and guarding in- 

 stinct of, 146 



Altrices, definition of, 214; devel- 

 opment of fear in young of, 219; 

 fate of young due to premature 

 development of fear in, 219-220; 

 specialization of fear in young of, 

 221 



Animal behavior, qualifications of 

 the student of, xix; interest and 

 difficulties in study of, 194; gen- 

 eral theory and analysis of, 195- 

 196 



Animal photography, general re- 

 quirements of, in birds, 63-68 



Animals, the evil of anthropomor- 

 phism in study of, xvii; duty and 

 privilege of student of, xviii; the 

 responses and hereditary equip- 

 ment of, 195-196; vulgar error 

 concerning, 229; variable per- 

 sonalities of, 229; winning con- 

 fidence of, 229-232; origin of 

 natural wildness and tameness 

 of, 229, 243; conditions of tam- 

 ing, 230-231 



Anthropomorphism, evil of, in 

 study of animal behavior, xvii 



Approach to the wild bird, the 

 problem of, and its solution, 66 



Audubon, John James, xxi, 146, 

 182, 189, 232, 234 



Baltimore Oriole. See Oriole 

 Bees and ants, the instincts of, 203 

 Bird-photography. See Photog- 

 raphy 

 Bird-study, history of new method 



of, xix 



Birds, guiding senses of, 6; rudi- 

 mentary condition of olfactory 

 organ in, 6 ; number of species of, 

 7 ; emotional life of , 7 ; tempera- 

 ture of body of, 7; routine in 

 home life of, 9, 90, 199; pug- 

 nacity of, 10 ; actions of, when 

 nest is robbed, 13-14; attach- 

 ment to nest, eggs, and young in, 

 15, 27; effect of noise of photo- 

 graphic shutter upon, 15, 68; ef- 

 fect of sounds upon, 15, 207; 

 maternal instincts of, 15; appear- 

 ance of feather-shafts in young 

 of, 16; behavior of, after change 

 of nesting site, 20, 49, 74, 118; 

 individualities of , 20, 72; interest 

 in watching nesting habits of, at 

 short range, 33-34; respiration of 

 (Redwing Blackbird), 47; diges- 

 tion, assimilation, and growth of 

 young of, 106, 186-188, 193; 

 sleep of, 112; effect of alarm calls 

 of, on birds of other species, 124, 

 224; care of eggs by, 170-171; 

 treatment of cast-off shells by, 

 172; care of young in nest of, 173; 

 discrimination of eggs by, 173; 

 brooding attitudes of, 175-180; 

 spreading of, in sun, 177-178; 

 behavior of, during incubation, 

 179, 224; gaping and yawning 



245 



