Grand Canyon National Park is home to a wide assortment of dangerous animals. The mountain lion, with retractable claws and large teeth, patrols vass areas of land within Grand Canyon National Park occassionally wandering into Grand Canyon Village. Black bears with massive and incredibly strong bodies and insatiable appettites are also register in NPS' Grand Canyon mamallian animal list. Elk, especially during the rut, can charge without notice bringing their sharp antlers to bear with 750 pounds of muscle behind them. These animals, as dangerous as they are, do not send as many Grand Canyon visitors to the emergency room as Spermophilus variegatus. Park rangers warn many to be wary of this most dangerous animal, the ferocious and unforgiving, rock squirrel.

Grand Canyon National Park is home to thousands of these small creatures, many of them making a living inside Grand Canyon Village using its charms and wit to lure unsuspecting tourists within range before it strikes. The rock squirrels are also indescriminante in their attacks, having just last week bitten a young toddler. Along with their sharp, albeit small teeth, squirrels may also pass a whole host of deadly diseases to their victims.