Effect of visual and vocal stimuli on breeding in the budgerigar (Melopsitacus undulatus)

Animal Behaviour - Tập 8 - Trang 104-106 - 1960
R.W. Ficken1, A. van Tienhoven2, M.S. Ficken1, F.C. Sibley1
1Department of Conservation, Cornell University, Ithaca, N.Y. U.S.A.
2Agricultural Experiment Station at Cornell University, Ithaca, N.Y. U.S.A.

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