436 



INDEX 



Tendons, leg, of game-birds, 70 

 Tern, characteristic form, 11 ; nest 



of, 296 

 (Noddy, Sooty), migration, 



172-3 

 Testes (of Mammalia), 222 



(of birds), structure, 254 sqq. 

 Thermometer Bird (Lipoa ocellata), 



nesting habits, 312 

 Thrush (Turdus musicus), food of, 



88-9; nest of, 294 ; economic 



aspect, 401 

 Mistle (T. viscivorus), seed- 



dispersal of mistletoe, 403-4 

 Thyroids, 137, 140 

 Tinamou (Crypturus), pedigree pro- 

 blem, 356, 358 

 Tit, Blue {Partis ccenilais), feeding of 



young, 304 

 Great {Panis major), feeding of 



young, 303 

 Long-tailed {Mgithalus cau- 



dattis), nest of, 300 

 Tongue, adaptations of, 95-6 

 Touch, sense of, 331 

 Tree Creeper {Certhia familiaris), 



habitat and life, 158 

 Turacin (pigment), 36 

 Turacoverdin (pigment), 36 

 Turkey, Wild (Meleagris ocellata), 



sex-character, 223 



Variations, terminology of, 369-70 ; 



illustrations, 371 sqq. ; 



origins, 373, sqq. 

 Voice, evolution of, 8, 190-1, 206 ; 



variety, 191-2 ; mechanism 



of, 193-4 ; see Song. 



Wagtail, Pied (Motacilla luguhris), 

 food of, 88 ; utility, 401 



Wall Creeper {Ticliodroma muraria), 



144. 151 



Warm-bloodedness, 136-7 



Water Ouzel (Cinclus aquaticus), 

 underwater progression, 145, 

 146, 153 ; a " refugee " 

 species, 152 



Wattle-duck {Sarcidiornis caruncu- 

 lata), dimorphism, 211 



Weaver-bird (Ploceus baya), intelli- 

 gence of, 341 

 (Vidua), dimorphism, 212 

 (Pyromelcena franciscana), di- 

 morphism, 212 



Webbed-foot, development, 145-6 



Whitman, Prof. C. O., observations 

 on mating, 177 sqq. 



Widgeon (Australian) (Mareca 

 punctata), sex-character, 223 



Wing, structure, 2 ; adaptations, 53 

 sqq. 



Woodcock (Scolopax rusticula), 

 transporting young, 308 ; 

 seed-dispersal by, 404 



Woodpecker (spp.), tail, 56 ; nest of, 

 297 ; climbing adaptation of 

 young, 304 ; intelligence of, 



"343 

 (Piais viridis), variation of food, 



89 

 Woodpigeon (Columba palumbus), 



nest of, 298 ; injurious, 413 

 Woods, birds of, 158 



Yolk, formation of, 248 



Young (of birds), feeding of, 302 



sQQ-f 343 ; education of, 305 ; 



defence of, 308 



Zoonerythrin (pigment), 35, 154 

 Zooxanthin (pigment), 35 



PRINTED IN GKEAT HRITAIN liV WILLIAM CLOWES AND SONS, LIMITED, LONDON AND BECCLKS. 



