AdvertisementWhy Killer Viruses Are On The Rise08:17Download AudioResumeFebruary 14, 2017Michaeleen DoucleffJane GreenhalghfacebookEmailOnce called the "Dutchmen" because of their large noses and large bellies, proboscis monkeys live only in Borneo. Ecosystems that have a lot of diverse animals, like this monkey, also tend to have a lot of diverse viruses. (Charles Ryan)