456 



A HISTORY OF BIRDS 



Coloration, procryptic, 323. 



— cryptic, 323. 



— apatetic, 323-27. 



— anticryptic, 325. 



— resplendent, evolution of, 351. 

 Convergent evolution, 439. 

 Coraciomorphae, oldest of, 59. 

 Correlated variation, 341. 

 Coverts, arrangement of, 14. 

 Cow-bird, parasitic habits, 132. 

 Cranes, characters of, 53. 



— dances of, 162. 

 Cuckoos, parasitic, 128, 131. 



Dabchick, care of young of, 224. 



Dancing, 163. 



Diastataxy, meaning of, 409. 



Digestive system, ig. 



Dimorphism, 299. 



Dippers, distribution of, 78. 



Display of Argus, 145. 



Bird of Paradise, 147. 



Bustard, 155. 



Black Cock, 157. 



. Ruflf, 159. 



Sun Bittern, 344, 352. 



Warblers, 347. 



Kagu, 351. 



— meaning of, 349. 

 Distribution, forms of, 78. 

 Divers, evolution of, 451. 

 Dodo, extinction of, 121. 



Ecdysis, peculiar forms of, 281, 285. 

 Eclipse plumages of Game-birds 



Ducks, 277. 

 Eggs of Cuckoo, 128 et seq. 



— peculiarities of, 196. 



— coloration of, 198 et seq. 



— white, 205. 



— structure of, 210. 

 Egrets and Elephants, 125. 

 Ethiopian sub-region, birds of, 65. 

 Evolution, convergent, 439. 



— parallel, 454. 



Extermination of British birds, 119. 

 Extinction of Great Auk, 120. 

 Dodo, 121. 



Solitaire, 122. 



Labrador Duck, 122. 



■ Cormorant, 122. 



Moa, 123. 



and 



Feathers, kinds of, 5, 11. 



— structure of, 6. 



— abrasion of, 81, 280, 284. 

 Feeding young, methods of, 225. 

 Feet, forms of, 386, 395. 

 Flamingo, change of colour in, 315. 

 Flight, altitude of, 96. 



— speed of, 96. 



Food, influence on colour, 315. 



Fowls, breeds of, 338. 



Frigate-birds, parasitic habits of, 127. 



— remarkable display of, 155. 



Galliformes, composition of, 50. 

 Gizzard, work of, 20. 



— peculiarities of, 20. 

 Glands, absence of, 15. 

 Gold-crests, peculiar distribution of, 7^. 

 Grebe, flightless, 361. 



Gregarious habits, formation of, 135 et 



seq. 

 Gruiformes, types of, 52. 

 Gullet, modifications of, 432. 

 Gulls, affinities of, 55. 



— predaceous habits of, 320, 



H 



Habit in relation to structure, 454. 

 Hangnests, aberrant nesting habits of, 



132. 

 Hearing, sense of, 29. 

 Heart, structure of, 25. 

 Heel-pads of nestlings, 261. 

 Hemipodes, reversal of sexual r61e in, 



171. 

 Hepatic phases, 300. 

 Hesperornis, characters of, 37. 



— pelvic girdle of, 385. 



— leg of, 385. 



Hoatzin, remarkable nesting habits, 238. 



— structural peculiarities of, 312. 



— aflfinities of, 450. 

 Homing instinct, 103. 

 Homoplasy, 448, 453. 



Hornbill, Helmet, use of casque, 422. 



— strange nesting habits, 215. 

 Hunting in concert, 139. 



Ichthyornis, peculiarities of, 37. 

 Indian region, birds of, 69. 

 Interbreeding, 301. 



