Bulletin of the National Speleological Society - ISSN 0146-9517
Number 12: 26-28 - November 1950

A publication of the National Speleological Society

Sex Ratios in Hibernating Bats
Harold B. Hitchcock


An apparent preponderance of males in hibernating bat populations of eastern Ontario, Quebec, New England, New York, Pennsylvania and New Jersey poses a problem of interest to scientists. This unbalanced sex ratio gives rise to the need for further study. The author gives a number of possible explanations and urges cooperation from speleologists in solving the mystery of the "missing" females. For the time being, at least, the rallying cry of the chiropterist may well be "cherchez la femme!"

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