The descent of man, and selection in relation to sex . n round the bower and become so excited that his eyes appear ready to start from his head ; he continues opening first one wing, and then the other, uttering a low, whistling note, and, 58 Yov Tetrao phasianellus, see Richai-dt^on, Fauna Bor. America,p. 361, and for further particulars Capt. Blakiston, Ibis, 18G3, p. the Cathartes and Ardea, Audubon, * Ornith. Biography,vol. 51, and vol. iii. p. 89. On the White-throat, Macgillivriiy, Birds, vol. ii. p. 354. On the Indian Bustard, Jerdon, Birdsof India, vol. iii.
The descent of man, and selection in relation to sex . n round the bower and become so excited that his eyes appear ready to start from his head ; he continues opening first one wing, and then the other, uttering a low, whistling note, and, 58 Yov Tetrao phasianellus, see Richai-dt^on, Fauna Bor. America,p. 361, and for further particulars Capt. Blakiston, Ibis, 18G3, p. the Cathartes and Ardea, Audubon, * Ornith. Biography,vol. 51, and vol. iii. p. 89. On the White-throat, Macgillivriiy, Birds, vol. ii. p. 354. On the Indian Bustard, Jerdon, Birdsof India, vol. iii. p. 618. ^9 Gould, Handbook to the Birds of Australia, vol. i. p. 444,449, bower of the Satin Bower-bird may always be seen in the Zoolo-logical Societys Gardens, Eegents Park. 70 SEXUAL SELECTION : BIEDS. PartIL • like the domestic cock, seems to be picking np some- thing from the ground, until at last the female goes gently towards him. Captain Stokes has describedthe habits and play-houses of another species, the Msm *;?, m-mwrn m\::i V. :3 o Chap. XIII. DECORATION. 71 Great Bower-bird, which was seen amusing itself by flying backwards and forwards, taking a shell alter- nately from each side, and carrying it through the archway in its mouth. These curious structures,formed solely as halls of assemblages, where both sexesamuse themselves and pay their court, must cost thebirds much labour. The bower, for instance, of thefawu-breasted species, is nearly four feet in length,eighteen inches in height, and is raised on a thickplatform of sticks. Decoration.—I will first discuss the cases in which themales are ornamented either exclusively or in a muchhigher degree than the females; and in a succeedingchapter those in which both sexes are equally orna-mented, and finally the rare cases in whi(;h the female issomewhat more brightly-coloured than the male. As withthe artificial ornaments used by savage and civilised men,so wdth the natural ornaments of birds, the head is
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