Overheated grizzlies enjoy cool baths University of Idaho study offers important info as climate warms By Eli Francovich, The Spokesman-Review Published: January 31, 2021, 6:04am Share: A study led by University of Idaho graduate student Savannah Rogers and associate professor of wildlife sciences Ryan Long, published in Functional Ecology, shows that grizzly bears in Yellowstone National Park bathe in cool water to prevent overheating. (Dreamstime/TNS) SPOKANE — Overheated grizzly bears, particularly pregnant ones, love a cold bath. Those are the findings from a study led by University of Idaho graduate student Savannah Rogers and associate professor of wildlife sciences Ryan Long. Their research, published in Functional Ecology, shows that grizzly bears in Yellowstone National Park bathe in cool water to prevent overheating.