INDEX; 



A. 



Abdomen, size and secondary use of, in young, 121. 



Abstract ideas, the nature of, if present in birds, 3. 



Accessories, or bird-photographer's outfit enumerated, 35. 



Alarm calls, in Catbird, 76, 77; effect of, upon birds of other species, 77, 122-123; in Robin, 123. 



Alarm clock, illustration of, 5. 



Allen, Charles A., 119. 



Allen, C. S., 115, 134. 



Altrices, definition of, 117; development of fear in young of, 120; fate of young due to premature 

 development of fear in, 120-12 1 ; care and education of young in, 121; specialization of fear in 

 young of, 121. 



Ampelis garrulus (Bohemian Waxwing), origin of specific name in, 52. 



Animal behavior, a working theory of, xvi. 



Animal photography, a desideratum of, 34. 



Animals, the evil of anthropomorphism in study of, xv; duty and privilege of student of, xv; the native 

 equipment of, xvi; vulgar error concerning, 125; variable personalties of , 125; winning confi- 

 dence of, 125-127; origin of natural wildness and tameness of, 125, 126, 137; conditions of 

 taming, 126, 127. 



Anthropomorphism, evil of, in study of animal behavior, xv. 



Approach to the wild bird, the problem of, and its solution, 33. 



Audubon, John James, 104, 108, 129, 130, 133, 136. 



B. 



Bag, for accessories of bird-photography, 35; for plates, 34. 



Baltimore Oriole (see Oriole). 



Basin Harbor (Vt.), Eaves Swallow dispossessed by House Sparrows at, 114, 115. 



Bird-photography (see Photography). 



Birds, mental faculties of, xvii ; instincts of, xvi ; problem of approaching, xvii ,33; strongest lure for, xvii ; 

 guiding senses of, 3; rudimentary condition of olfactory organ in, 3; actions of, when nest is 

 robbed, 4; effect of noise of photographic shutter upon, 5, 34; effect of sounds upon, 5, 68, 112; 

 appearance of feather-shafts in young of, 6; behavior of, after change of nesting site, n, 22, 39, 

 73; attachment to nest, eggs, and young in, 6, 13; individualities of, 36; attractions in haunts 

 of man for, 5 1 ; routine in home life of, 54 ; interest in watching nesting habits of, at short range, 

 15, 16, 54; brooding in Cedar-birds, 17, 56; maternal instincts of, 5; digestion, assimilation, 

 and growth of young of, 66; care of young in nest of, 94; brooding attitudes of, 94, 97-98; 

 automatic response in gullet of young of, 101, 102; inspection and cleaning of nest in, 103-110; 

 economy of food in, 102; struggles with insects at nests of, 103; cleaning or sanitary instinct 

 in, 103, 104; disposal of excreta of young of, 104-110; use of excreta of young .as food by, 

 105-110; force of habit displayed in, in; cleanliness of nesting site in, 107, 108; adapta- 

 bility of, 113; change of diet in, 116; classification of, based on early condition of young in, 

 117; fear in old and young of, 117; fate of young of, due to premature development of fear, 

 120, 12 1 ; lack of discrimination in young of, 121; specialization of fear in young of, 121; use 

 of pot-belly in young of, 121; effect of alarm calls of, on birds of other species, 77, 122, 123; 

 in winter at Jefferson (O.), 128; behavior of, during incubation, 134; taming of, 125-137; 

 tameness of, in nature, 135-137; of Galapagos Islands, 136, 137; of Charles Island, 136; wild- 

 ness of, in Arctic America, 136-137. (See under names of species.) 



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