The pambu worm evolved from the gliding sagworm. Many specimens were blown into the pambuforest and couldn't get away, because the wind was broken by the giant pambu plants. So the worms had to adapt to their environment. Instead of eating the leaves, they just eat toppled down pambu, which are common in the pambuforest. Because they hardly could glide away anymore, the feathers on their backs have stiffened and are used as shovels, for when they are buried under leaves or other parts of plants. For eating the pambu, their tongue became a radula. The pambu worms are multitudinous in the pambuforests, and they loom large in these forests, since they convert the dead pambu into humus. They are 6 centimeters long.