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
Pygmy cormorant number of individuals which put the species on the International Union for Conservation of Nature (IUCN) Red List as a vulnerable species. It is also hunted in leisure activities, and in Iran the pygmy cormorant is commercialized for cooking. This species is distinguished from the great cormorant and the common shag by its much smaller size, lighter build, and long tail. It feeds mainly on fish, often hunting in groups, and perches in trees between fishing expeditions. The pygmy cormorant is one of the species to which the "Agreement on the Conservation of African-Eurasian Migratory Waterbirds" (AEWA) applies. Pygmy cormorant