. The descent of man, and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings. Chap. XIII. Vocal Music. 375 It seems now well made out that the great throat pouch oi the European male bustard (Otis tarda), and of at least four other species, does not, as was formerly supposed, serve to hold water, but is connected with the utterance during the breeding-. Fig. 40. The Umbrella-bird or Cephalopterus ornatus male irom Brehm). season of a peculiar sound resembling ";43 A crow-lik& bird inhabiting South America (Cephalopterus ornatus, fig. 40) is cal
. The descent of man, and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings. Chap. XIII. Vocal Music. 375 It seems now well made out that the great throat pouch oi the European male bustard (Otis tarda), and of at least four other species, does not, as was formerly supposed, serve to hold water, but is connected with the utterance during the breeding-. Fig. 40. The Umbrella-bird or Cephalopterus ornatus male irom Brehm). season of a peculiar sound resembling ";43 A crow-lik& bird inhabiting South America (Cephalopterus ornatus, fig. 40) is called the umbrella-bird, from its immense top knot, formed of * 43 The following papers have been lately written on this subject r Prof. A. Newton, in the 4 Ibis/ 1862, p. 107, Dr. Cullen, ibid. 1865, p. 145; Mr Flower, in * Proc. Zool. Soc.' 1865, p. 747 ; and Dr Murie, in 'Proc Zool. Soc. 1868. p. 471. In this latter paper an excellent figure is given of the male Austra* ban Bustard in full display- with the sack distended. It is a singular fact that the sack is not developed in all the males of the same species,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Darwin, Charles, 1809-1882. London, J. Murray
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