Grizzly Bears That Kill Livestock

January 1, 1983

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Thirty-seven grizzly bears (Ursus arctos) equipped with radio transmitters were monitored in and around Yellowstone National Park between 1974 and 1979. Ten of the bears were known or suspected to kill livestock; 3 preyed on cattle, 6 on sheep, and 1 on both. Bears that killed livestock ranged widely in and out of Yellowstone Park and normally exhibited foraging habits similar to those of other bears. All subadult and adult bears known to have the opportunity killed sheep. Most bears that came into contact with cattle did not make kills. All known cattle killers were adult bears, while 4 sheep killers were subadults. Sheep grazing should be reduced as much as possible on grizzly range, and cattle grazing allowed only if owners are willing to absorb predation losses.

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