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
Baluchistan pygmy jerboa birth, are born in the spring and summer months. No more than 2 litters a year are normally produced. The natural predators of the jerboa are the leaf-nosed viper ("Eristocophis mcmahoni"), the trans-Caspian monitor lizard ("Varanus caspius"), and the sand cat ("Felis margarita"). Baluchistan pygmy jerboa The Baluchistan pygmy jerboa, or the dwarf three-toed jerboa, ("Salpingotulus michaelis") is a species of rodent in the family Dipodidae. It is the only species in the genus Salpingotulus. Adults average only in head and body length, with the tail averaging . Adult females weigh . It is currently considered to be endemic to