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Winter weather in the Gallatin Canyon which borders Yellowstone National Park. This image was taken during National Science Foundation-supported research by Scott Creel, a professor of ecology at Montana State University, to examine the response of prey to the risk of predation and the physiological costs and dynamical consequences of those responses.
One part of this work examined the responses of elk (Cervus elaphus) to variation in the risk of predation by wolves (Canis lupus).Image credit: Scott Creel and John Winnie, Montana State University, Department of Ecology
