Herds of beefalo (a bison-cattle hybrid) are causing massive damage to vegetation, water supplies, other animal species, and American Indian cliff dwellings in the Grand Canyon.
Beefalo also are incredibly thirsty animals; one beefalo can drink 10 gallons of water during each trip to the watering hole, according to the BBC. With an estimated 600 beefalo, at least, wandering around the canyon's North Rim, the herd can quickly drink scarce waterholes dry.
The beefalo's selfishness is also costing other Grand Canyon dwellers. The BBC reports that animals, insects, and rare plants are getting pushed out of the picture, throwing the ecosystem out of balance.