Moles

 "Most small animals have to watch out for predators even when they are fully grown. Golden moles from southern Africa stay underground all the time because they are just about snack-size as far as a bird of prey or a jackal is concerned. But the moles don't want to have feces all over their homes, so they keep one little chamber in their large burrows just for (bathroom use)." Nicola Davies

photo via Wikimedia Commons