Some dung beetles are called tumblebugs. They may also be called rollers. These dung beetles roll animal dung into a ball and then bury the ball. The beetles feed on the dung ball, or sometimes the female lays her eggs in the ball. A beetle may roll the dung ball over bumpy ground, which can cause the beetle and the ball to tumble, giving the dung beetle the tumblebug name (although beetles are not true bugs, which are a different kind of insect).