Gibblambu are strange, energetic, mindless eating machines. They begin as small larva, indistinguishable from ordinary harmless caterpillars. They then enter a seven year long pupate stage, where the creature's mass increases by 500%. After hatching the resulting monstrosity is capable of eating double it's body weight every hour. The creatures embark on an orgy of untold destruction, after which mating is accomplished and all adults promptly die off. Swarms of Gibblambu follow the seven year breeding cycle, which cause untold ecological damage.