Budgerigars in Bush and Aviary

50 per cent appearance aviary aviculturists beautiful blue Budgerigar blue suffusion body colour bred breeders breeding breeding-cage brood bush cage cage-birds canary seed cause cere cheek-patches cheeks Cinnamonwing clutch cobalt cocks colour varieties dark green E. W. Jones eggs factor feathers feed female flocks flying French moult grass green Budgerigar green food green/whites greens and blues grey Greywing heat hens heterozygote hulled oats hundred inbreeding inches interesting known light little parrot male markings mated mauve Melopsittacus undulatus Mendelian inheritance millet months old natural nest-boxes normal body colour obtained olive yellow pair of birds pale parents parrakeets perches placed Plate plumage possible produced progeny reared record rickets rings season shade Shell Parrots shelter sky blue South Australia South Wales species specimens supplied Sydney thousand throat-spots Uccle undulations variations violet wild wings wire yellow Budgerigars Yellow-wing young birds youngsters Zebra Finches