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Contact: Tim Stephens
University of California - Santa Cruz

Jack Hopkins, University of California - Santa Cruz

Caption: Researcher Jack Hopkins used barbed-wire snares to collect hair samples from bears in Yosemite National Park. Analysis of isotope ratios in hair samples showed how much of the bears' diets came from human food.

Credit: Photo courtesy of Jack Hopkins

Usage Restrictions: For use only with news coverage of this research

Related news release: Yosemite bears and human food: Study reveals changing diets over past century

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