The ecosystems that contain Yellowstone and Glacier National Park have populations of grizzlies that are rebounding so much that bears are moving out from the mountains back onto the prairie, where people and agriculture now dominate the landscape.

Operators can remain safely in a vehicle while piloting the drone to harass and direct grizzly bears away from sensitive areas.

Great Plains, Montana - As grizzly bears expand their range onto the Great Plains, human-bear conflicts are on the rise. To prevent livestock damage and ensure safety, wildlife managers have turned to drones,

Deadly bear attacks can be prevented by drones, according to new research. Unmanned aerial vehicles are the "magic tools" needed to chase killer grizzlies away from people, say American scientists. Drones are far more effective than dogs at "hazing" - or distracting - the giant beasts,