Pygmy hippopotamus population that freely breeds in zoos around the world. Between 1970 and 1991 the population of pygmy hippos born in captivity more than doubled. The survival of the species in zoos is more certain than the survival of the species in the wild. In captivity, the pygmy hippo lives from 42 to 55 years, longer than in the wild. Since 1919, only 41 percent of pygmy hippos born in zoos have been male. While the common hippopotamus was known to Europeans since classical antiquity, the pygmy hippopotamus was unknown outside its range in West Africa until the 19th century. Due
Northern pygmy salamander Northern pygmy salamander The northern pygmy salamander (or northern pigmy (sic), "Desmognathus organi") is a terrestrial species of salamander in the family Plethodontidae and genus "Desmognathus". Along with the southern pygmy ("D. wrighti") and the seepage salamander ("D. aeneus"), these are some of the smallest salamander species in North America and can be found in higher elevations in the southern Appalachians. "Desmognathus organi" can be identified by its small size, averaging only 40–60 mm total length, and its distinct herringbone pattern on the dorsal side and copper colored eyelids, which are traits only shared with "D. wrighti". Dorsal coloration can