Carnegie Institution of Washington Publication Volume 257, V. 3

Carnegie Institution of Washington Publication Volume 257, V. 3

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 edition. Excerpt: ...result. I do not think the egg had any chance of being fertilized. Mar. 31.-----This morning the male has been to the nest and the female resigned. He.exarnined the egg, but did not take any interest in it. He did not cover it, but began to call for the female. After a few moments he went over to the opposite box and called, and the female soon returned to her egg. The male is getting more tolerant, leaving the female more quiet on her nest. But he is evidently not in the spirit of sitting, and the presence of the egg does not stimulate him to the act. The decisive stimulus for such an act is thus not external but internal--probably a feeling which comes over a male "periodically," and which he will manifest perhaps only if the external stimulus is also present. This seems to me to be a not unimportant point. At 9 ' 45"' a. m., the male went to the nest again, and this time he did not disturb the female, but fondled her head affectionately and then went off as if fully reconciled to her as a mate. All this is the more interesting, as he still has no impulse to sit. He is ready for making a nest and to accept a mate, but he requires time to generate the impulse to sit. This impulse naturally follows the period of sexual activity, and he is now in the latter period. Apr. 1.--The second egg was laid at 8 ' 15"' a. m. The male behaves as on yesterday, allowing the female peace on the nest. If she goes to the floor of the cage when he is there he may behave as if he had accepted her or he may drive her unmercifully. At 1 ' 30"' p. m. I find the male on the nest and the female on the floor. He sits on the eggs now, but he does not hesitate to come off three times within half an hour...
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Product details

  • Paperback | 96 pages
  • 189 x 246 x 5mm | 186g
  • United States
  • English
  • black & white illustrations
  • 1236931971
  • 9781236931979