. Bird behaviour psychical and physiological . -o s. REVERSION IN HYBRIDS 331 Fowls and of Pigeons which were all devoid of theancestral colours, as related in his admirable butrather neglected work, Variation of Animals andPlants under Domestication. Now and then hybrids between species havebeen produced showing an extraordinary likenessto some species allied to, but distinct from, thetwo forms concerned; the classical instance ofthis is that of the two Sheldrakes bred at the Zoomany years ago between the little-known SouthAfrican Grey-headed Sheldrake {C as arc a cana),which much resembles t

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. Bird behaviour psychical and physiological . -o s. REVERSION IN HYBRIDS 331 Fowls and of Pigeons which were all devoid of theancestral colours, as related in his admirable butrather neglected work, Variation of Animals andPlants under Domestication. Now and then hybrids between species havebeen produced showing an extraordinary likenessto some species allied to, but distinct from, thetwo forms concerned; the classical instance ofthis is that of the two Sheldrakes bred at the Zoomany years ago between the little-known SouthAfrican Grey-headed Sheldrake {C as arc a cana),which much resembles the Ruddy Sheldrake, and ourcommon Sheldrake; these resembled the Australiandark grey Sheldrake {Casarca tadornoides) far moreclosely than either parent. These birds are to beseen at the South Kensington Museum. At theZoo lately, also, was a cock Pheasant presented byMrs. Johnstone, the first importer of the Formosanblack Mikado Pheasant (Calophasis mikado), andbred between that bird and the copper-and-whiteElliots Pheasant (Phasianus ellioti) of Ch

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Keywords: ., bookauthorfinn, bookcentury1900, bookdecade1910, booksubjectbirds