Cattle on Grizzly Bear Range

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Abstract
The author was assigned to the study of bear predation on cattle in Jackson Hole, Wyoming, by the U. S. Fish and Wildlife Service. In 1945, among 1648 cattle, there were 25 known causalties, 4 from unknown causes, 11 from disease or larkspur poisoning, and 10 from bear predation. In 1946 there were 24 casualties. Of the 11 examined, 2 died from unknown causes, 2 from causes other than predation, and 7 from bear predation. In addition, 3 animals had been injured by bears but had escaped. Some of the kills were made by grizzlies, and circumstances suggest all may have been. Apparently grizzlies in general may be expected to prey on available cattle, while predation by black bears is more sporadic, confined to individual livestock killers. This raises a problem in equitable appraisal of varied uses on public lands occupied by grizzlies.

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