Authors
Susan J. Hannon, Ronald L. Mumme, Walter D. Koenig, Sandy Spon, Frank A. Pitelka, Poor Acorn Crop, Dominance, and Decline in Numbers of Acorn Woodpeckers, Journal of Animal Ecology, Vol. 56, No. 1 (Feb., 1987), pp. 197-207
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Hannon et al. (1987) studied this question.