INDEX. 



A. 



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



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



Accessories, or bird-photograplier'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, ^^. 



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



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



Baltimore Oriole (see Oriole). 



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



Bird-photography (see Photography) . 



Birds, mental facultiesof, xvii; instincts of, xvi; probleiuof appiroaching, XA'ii, 33; strongest lure for, xvii; 

 guiding senses of, 3 ; rudimentar)' condition of olfactory organ in, 3 ; actions of, when nest is 

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

 appearance of feather-shafts in young of, 6; behavior of, after change of nesting site, 11, 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; inaternal instincts of, 5; digestion, assimilation, 

 and growth of young of, 66; care of young in nest of, 94; brooding attitudes of, 94, 97-9S; 

 automatic response in gullet of young of, loi, 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 j'oung of, 104-110; use of excreta of young as food by, 

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

 bilitj' of, 113; change of diet in, 116; classification of, based on early condition of 3'oung in, 

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

 120, 121; lack of discrimination in young of, 121; soecialization of fear in young of, 121; use 

 of pot-belly in young of, 121; eft'ect 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. (St'c under names of species.) 



139 



