INDEX 



433 



Iridescence of feathers, 34, 38 

 Isolation, factor in evolution, 386 



Jacana, foot of, 61, 97, 98, 149 

 Jackdaw (Corritfmon^Ju/a), economic 



aspect, 401 

 Jaw of birds, structure of, 64 

 Jungle-fowl {Gallus bankiva), di- 

 morphism, 211 ; poultry' 

 ancestor, 366 ; hybridisation, 

 391 



Kea Parrot {Nestor notabilis), ab- 

 normal dietary, 89 ; injurious, 



413 

 Kestrel (Tinnunailwi tinnunculus) , 



form of ovary, 245 

 ICidneys, function of, 132 

 Kingfisher (Alcedo ispida), egg of, 



275 ; nest of, 297. 

 Kiwi (ApterjTc), nostrils of, 15, 331 ; 



egg of, 272 ; nest of, 296 ; 



problem of ancestry, 356 



Lapwing {Vanellus vanellus), court- 

 ship behaviour, 185 ; defence 

 of young, 308 

 Lark (Alauda arvensis), egg of, 271 

 Leg of birds, skeletal features, 59 

 Lens tissue, injection of, 381-2 

 Lipochromes (pigments), 35 

 Liver, functions of, 105-6 

 Lizard, Australian Collared (Chlamy- 

 dosaurus), bipedal progres- 

 sion, 3 

 Lungs, structure of, 127 sqq. ; see 



Respiration. 

 Lyre Bird (Menurus), dimorphism, 

 212 



Magpie (Pica pica), nest of, 294, 298 

 Mallard (Anas boschas), plumage, 24 ; 



moulting, 30-1 ; courtship 



behaviour, 184 

 Man, influence of, on bird-life, 408 



sqq. 

 Marshes, birds of, 157 

 Martin, House (Chelidon urbica), 



nest of, 295, 298 

 Mating, general characteristics, 177 



sqq. 

 Meadow, birds of, 158 

 Melanin (pigments), 35, 37, 39, 40 

 Mendelian inheritance, 391 

 Mentality of birds, 7-8, 196 sqq., 



300 sqq. ; see Behaviour, 

 Mesoptiles, 23 

 Migrants, summer, winter, partial, 



161 



Migration, main facts, 10, 160 sqq. ; 

 routes, 163-4 ; height of 

 flight, 164-5 ; velocity, 165- 

 6 ; order of, 166-7 ; spring 

 and autumn flight con- 

 trasted, 167 ; a racial custom, 

 167-8 ; the liberating 



stimuli, 168 sqq. ; way- 

 finding, 170 sqq. ; possible 

 origin of, 174-5 



Moa, egg of, 271 



Modifications, somatic, 369-70 ; 

 illustrations of, 376 



Moorhen (Gallinula chloropus), in- 

 telligence of, 340, 342 ; hairy 

 variety, 371 



Moorland Birds, 153 



Moulting, 14, 29 sqq. 



Mound Bird (Megapodius, spp.), 

 nest of, 296-7 ; nesting 

 habits, 311 sqq. 



Mountain birds, 150 sqq. 



Muscular system, 69 ; activity, 113 

 sqq. 



Mutations, 369-70 



Neossop tiles, 22-3 



Nervous activity, 115 sqq., 138 



Nest, uses and construction of, 294 

 sqq. ; forms and situations, 

 297 sqq. ; " false " and 

 " cocks' " nests, 302 ; cleans- 

 ing of, 304 



Nesting, origin of, 9 



Nest-building, psychological aspect, 

 300 sg?., 314 



Nightingale (Luscinia megarhyncha) , 

 song, 196 



Nightjar ; see Goatsucker. 



Nut-hatch (Sitta ccesia), nest of, 297 



Oil-gland ; see Preen-gland. 



Omithiscia ; see Dinosaur. 



Osprey (Pandion halietus), eye of, 

 318 



Ostrich (Struthio), plumage, 23, 358, 

 368 ; pelvic girdle, 56 ; 

 dorsal vertebrae, 67 ; foot- 

 form, 149 ; problem of 

 ancestry, 356, 365 ; under 

 domestication, 368 ; in- 

 herited callosity, 378 



Out-breeding, 386 



Ovary, formation of, 243 sqq. 



Oven-bird (Furnarius), nest of, 298 



Owen, Sir R., on wing-forms, 83-4 



Owl (spp.), flight of, 85 ; abnormal 

 food supply, 403 



2 F 



