REDЯUM

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On the evening of August 13, 1967, two women were attacked and killed by grizzly bears (Ursus arctos horribilis) in separate incidents within Glacier National Park (GNP). Following these incidents, there was speculation that due to odors associated with menstruation, women may be more prone to attack by bears than are men (Rogers et al. 1991).


In a study designed to test the hypothesis that bears are attracted to the odors of menstruation, Cushing (1983) reported that when presented with a series of different odors (including seal scents, other food scents, non menstrual human blood, and used tampons), four captive polar bears elicited a strong behavioral response only to seal scents and menstrual odors (used tampons).

Herrero (1985) analyzed the circumstances of hundreds of grizzly bear attacks on humans, including the attacks on the two women in GNP, and concluded that there was no evidence linking menstruation to any of the attacks. The responses of grizzly bears to menstrual odors has not been studied experimentally.

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Menstrual odors were essentially ignored by black bears of all sex and age classes.

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