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
Lesser pygmy flying squirrel and ecology of this species. Lesser pygmy flying squirrel The lesser pygmy flying squirrel ("Petaurillus emiliae") is a species of rodent in the family Sciuridae. It is endemic to Malaysia. It is listed as Data Deficient because it is known only from the type specimen collected in 1901. Adequate surveys have not been done to look for this species, and so it cannot be considered Extinct. The lesser pygmy flying squirrel is arboreal and probably prefers forest. It is threatened by habitat conversion due to agriculture and logging. There are no conservation measures in place. Further studies are needed into