Check out this awesome raw footage of a grizzly bear scaring a pesky coyote away from her unsuspecting cub. The footage can be a little hard to make out, but you should be able to see the coyote approach the cub in the middle of the clearing, and then hear the mama grizzly bear start growling and charging down the mountain to rescue her cub.
Not sure that a single coyote could even take down a grizzly bear cub, but this mama grizzly wasn’t taking any chances.