Scorpions live on insects, but they kill and devour their own species as well.
One scientist placed a hundred of these arachnids in a large glass vessel, and after a few days only fourteen remained. The rest had been killed and eaten by the others. He put a pregnant female in a glass vessel and observed her as she devoured her young as fast as they were born. One escaped, taking refuge on the mother's back, and found revenge by killing the mother scorpion in turn. If cornered with no possible escape, a scorpion will sting itself to death with that flexible stinger on the back end of its body.