YELLOWSTONE NATIONAL PARK, Wyo. – Biologists are set to capture grizzly bears for research in Yellowstone National Park starting on Monday and are warning visitors of the process.

The plan to capture the bears is part of an effort by the U.S. Geological Survey and Yellowstone to document the recovery of grizzlies in the Yellowstone ecosystem under the Endangered Species Act, the National Park Service said.

"Monitoring of the grizzly bear population is vital to ongoing research and management of grizzly bears in the Greater Yellowstone Ecosystem," the park said.

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The captures will take place starting Monday, Sept. 1 and last through Oct. 15.

Biologists use natural food sources such as recent road-killed elk an

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