Black and white ruffed lemurs have twelve different vocalisations that are loud enough as to be heard from half a mile away. Unlike most primates, they build up to fifteen nests in trees to leave infants in while they forage for fruits, seeds, leaves and nectar, transporting their infants in their mouths rather than having them cling on to their mothers’ midsection. They travel around home ranges in groups of up to 16 and have strong social bonds between members of the group.