species of mouse that lives in the Southwestern deserts of the U.S. eats scorpions and other living things, hunts by night and howls at the moon. According to New Scientist, the grasshopper mouse (Onychomys torridus) will eat crickets, tarantulas, even other rodents.
Even the fearsome Arizona bark scorpion is not safe from the grasshopper mouse. New Scientist said, “It fights bravely, stinging its attacker on the nose. To no avail. The mouse ignores the painful venom and cruelly breaks the scorpion’s tail by pummelling it into the ground, then bites its head and feasts on its flesh.”
From virtually the day they are born, grasshopper mice are what New Scientist calls “natural killers.” Even baby mice, which are called pups, raised in captivity learn quickly how to take down and eat prey much larger than themselves.
Grasshopper mice don’t dig their own burrows, but take over burrows constructed by other mice and forcibly evict the original residents. When food is scarce, they will turn to other rodents for food, including mice of their own species.