The Zookeeper is a man with an Australian accent who works at the Springfield City Zoo. When Homer Simpson enrages several animals and causes the rhinos to break out of their cage, he claims to have warned the zoo that the fence was not strong enough to have held them. However, he then realized that he only meant to warn it and did not actually do so. He initially attempted to shoot the Rhinos with a tranquilizer dart, but a misfire resulted in it accidentally tranquilizing a Sloth and having the opposite effect of temporarily invigorating it before collapsing out of exhaustion. He enclosed all but one of the rhinos in a cage and threw a net at the other, ensuring all of the animals were captured.