Scientists are monitoring the grizzly bear population at Yellowstone National Park as part of a study required by the Endangered Species Act.

Officials said they are beginning the captures Monday and will continue through Oct. 16.

Bait being used involves roadkill and other natural sources that can be found here.

For those visiting the park, Yellowstone staff are asking guests to stay clear of locations that are baited, as bears may be nearby.

Every baited location will be clearly marked with signs placed around the area.