[230] See, for instance, Mr. Gould’s account (‘Handbook of the Birds of Australia,’ vol. i. p. 133) of Cyanalcyon (one of the Kingfishers) in which, however, the young male, though resembling the adult female, is less brilliantly coloured. In some species of Dacelo the males have blue tails, and the females brown ones; and Mr. R. B. Sharpe informs me that the tail of the young male of D. Gaudichaudi is at first brown. Mr. Gould has described (ibid. vol. ii. p. 14, 20, 37) the sexes and the young of certain Black Cockatoos and of the King Lory, with which the same rule prevails. Also Jerdon (‘Birds of India,’ vol. i. p. 260) on the Palæornis rosa, in which the young are more like the female than the male. See Audubon (‘Ornith. Biograph.’ vol. ii. p. 475) on the two sexes and the young of Columba passerina.
[231] I owe this information to Mr. Gould who shewed me the specimens; see also his ‘Introduction to the Trochilidæ,’ 1861, p. 120.
[232] Macgillivray, ‘Hist. Brit. Birds,’ vol. v. p. 207-214.
[233] See his admirable paper in the ‘Journal of the Asiatic Soc. of Bengal,’ vol. xix. 1850, p. 223; see also Jerdon, ‘Birds of India,’ vol. i. introduction, p. xxix. In regard to Tanysiptera, Prof. Schlegel told Mr. Blyth that he could distinguish several distinct races, solely by comparing the adult males.
[234] See also Mr. Swinhoe, in ‘Ibis,’ July, 1863, p. 131; and a previous paper, with an extract from a note by Mr. Blyth, in ‘Ibis,’ Jan. 1861, p. 52.
[235] Wallace, ‘The Malay Archipelago,’ vol. ii. 1869, p. 394.
[236] These species are described, with coloured figures, by M. F. Pollen, in ‘Ibis,’ 1866, p. 275.
[237] ‘Variation of Animals, &c., under Domestication,’ vol. i. p. 251.
[238] Macgillivray, ‘Hist. British Birds,’ vol. i. p. 172-174.
[239] See, on this subject, chap. xxiii. in the ‘Variation of Animals and Plants under Domestication.’