INDEX 



Acadian Flycatcher, 254. 

 Acanthis linaria, 236-237. 

 Accipiter atricapillus, 266-267. 

 cooperi, 269-271. 

 velox, 268-269. 

 Adaptation, shown by 

 bill, 5, 25, 57, 59, 70, 86, 110-111, 

 123, 139, 190, 191, 214, 234-235, 

 264, 349. 

 foot, 24-25, 35, 50, 159, 264, 282, 



349. 



mucilaginous saliva, 26, 130, 140. 

 power of regurgitation (see Regur- 



gitation). 



protective coloration, 5, 26,^3-35, 

 44, 56, 67, 104-105, 107-108, 122, 

 130, 146, 171, 183, 185, 190, 262, 

 294, 318, 348, 349. 

 tail, 25, 110, 140, 240, 283, 350. 

 tongue, 139, 140, 214. 

 wing, 5, 24, 35, 44^5. 

 Agelaius phoeniceus, 96-98. 

 Alder Flycatcher, 258. 

 Ammodramus caudacutus, 239-240. 

 maritimus, 240-241. 

 sandwichensis savanna, 225-226. 

 savannarum passerinus, 226-227. 

 Ampelis cedrorum, 141-144. 

 Anthus pensilvanicus, 348. 

 Antrostomus vociferus, 185-187. 

 Asio accipitrinus, 290-291. 

 wilsonianus, 288-289. 



Bachman's Sparrow, 242. 



Bald Eagle, 281, 282-283. 



Baltimore Oriole, 56-61, 62. 



Bank Swallow, 54-55, 159, 195. 



Barn Owl, 293-294. 



Barn Swallow, 49-51, 53, 54. 



Barred Owl, 291-292. 



Bewick's Wren, 201. 



Bird boxes, xxv, 42-43, 46, 48-49, 72, 



288. ' 



Bird psychology, 46-47, 107-108, 255, 

 318-320. 



association of ideas, 72, 87. 



courage, 28, 29, 32, 71, 200, 267. 



dissimulation, 32, 39-40, 160, 172. 



expression of emotions and ideas, 

 by use of crests, attitudes, 



and movements, 3, 9, 129, 141- 

 142, 288, 332. By voice, calls 

 of warning, 40, 50 ; cries of an- 



fer, distress fear, pain, 9, 121, 

 50, 172, 180 ; scoldings, 60, 316 ; 

 songs, 18, 99, 104, 169, 232, 238, 

 316, 332, 334. 



individuality, 10-11, 14-15, 59, 201, 

 255, 302, 318-320. 



inherited instincts, 27. 



intelligence shown in 

 building, 52, 55, 136, 318 ; bring- 

 ing up young, 18 ; cooperation, 

 18, 46-47, 157, 281 ; discrimina- 

 tion between eggs, 180 ; getting 

 food, 282, 295 ; protecting young, 

 39-40, 99; protective attitudes, 

 devices, and movements, 27, 142, 

 161, 255-256, 289 ; strategy, 39- 

 40, 49, 160, 161, 255, 269 ; turning 

 to man for help, 46, 81-82, 238. 



play impulse, 75. 



storing habit, 133, 218-219, 299. 

 Birds, 



agents in cross-fertilization and 

 fruit-planting, 4-5, 123. 



anecdotes about, 107-108, 142, 157 ; 

 appealing to man for help, 46- 

 47, 238 ; defense of nest, 87 ; de- 

 votion to young, 28-29, 36-37, 

 39-40, 71, 172; feeding neigh- 

 bor's children, 100-101, 318-320 ; 

 friendliness when well treated, 

 9, 10-11, 46-47, 81-82, 113-115, 

 124-125, 129, 302 ; originality of 

 Crow, 14-15. 



as guides to water, 30-31. 



bills, feet, tails, wings of (see 

 Adaptation). 



comparisons of groups of, 40, 79, 

 91-92, 109-111, 143-144, 173, 181- 

 182, 190-191, 196, 204-205, 214- 

 216, 219, 242-246, 258-259, 271- 

 272, 284-285, 295, 297, 302-303, 

 306-307, 339-342, 350, 361-363. 



destruction of, 3, 31-32, 37, 64- 

 65, 78-79, 117-118, 122-123, 137, 

 138, 236. 



domestic life of, as parents, 2-3, 

 8-9, 15, 18, 19, 28-29, 32, 36-37, 



