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Show 122 ZOOLOGY OF TilE VOYAGE OF TilE BEAGLE. bird alone hatches the eggs, and for some time afterwards accompanies the young. The cock when on the nest lies very close; I have myself almost ridden over one. It is asserted that at such times they are occasionally fierce, and even dangerous, and that they have been known to attack a man on horseback, trying to kick and leap on him. My informer pointed out to me an old man, whom he had seen much terrified by one chasing him. I observe, in Burchell's Travels in South Africa, that he remarks, " having killed a male ostrich, and the feathers being dirty, it was said by the Hottentots to be a nest bird." I understand that the male emu, in the Zoological Gardens, takes care of the nest: this habit therefore is common to the family. • The Gauchos unanimously affirm that several females lay in one nest. I have been positively told, that four or five hen birds have been actually watched and seen to go, in the middle of the day, one after the other, to the same nest. I may alld, also, that it is believed in Africa, that two or more females lay in one nest:t Although this habit at first appears very strange, I think the cause may be explained in a simple manner. The number of eggs in the nest varies from twenty to forty, and even to fifty; and according to Azura to seventy or eighty. ,. Now although it is most probable, from the number of eggs found in one district being so extraordinarily great, in proportion to that of the parent birds, and likewise from the state of the ovarium of the hen, that she may in the course of the season lay a large number, yet the time required must be very long. Azara states,:~ that a female in a state of domestication laid seventeen eggs, each at the interval of three days one from another. If the hen were obliged to hatch her own eggs, before the last was laid, the first probably would be addled; but if each laid a few eggs at successive periods, in different nests, and several hens, as is stated to be the case, combined together, then the eggs in one collection would be nearly of the same age. If the number of eggs in one of these nests is, as I believe, not greater on an average than the number laid by one female in the season, then there must be as many nests as females, and each cock bird will have its fair share of the labour of incubation; and this during a period when the females probably could not sit, on account of not havinO' finished 1 . 0 aymg.~ I have before mentioned the great numbers of huachos, or scattered • It :~.ppears, also, from Mr. Gould's lato most interesting discoveries regarding tho habits of tho Talefjalla Lathami, (an .Australian bird, one of tho Rnsores,) that several females lay in one nest, and that tho eggs are hatched by the heat engendered by a mass of decaying vegetable matter. It appears that tho males assist the females in scratching together the leaves and earth, of which the great conical mound or nest is composed. + Burchell's Travels, vol. i. p. 280. t .Azura, vol. iv. p. 173. § ~,ichtcnstein, however, (Travels, vol. ii. p. 25.) state~, that tho hens begin to sit when ton or twelve rggs •ro l:\1<1, nnu that they afterwards continuo laying. Ilo affirms that by day tho hens take turns in sitting, but that tho cock sits all night. |
