Like the dinosaurs that became extinct 70 million years ago, rhinoceros at sixty million years ago there were 30 species living on Earth is also experiencing extinction.
At present only 5 types of rhino living in the world including 3 types of rhinos live in Asia, namely: Rhino Sumatera (Sumatran rhino) horned two or Dicerorhinus sumatrensis Fischer, the Javan rhino (Javan rhino), or one-horned Rhinoceros sondaicus Desmarest, Indian Rhinoceros (Indian rhino) Rhinoceros unicornis one-horned, or Linnaeus.
One of four sub-species of African black rhinoceros has been declared extinct after researchers failed to find the animal in its last known habitat.
The West African black rhino (Diceros bicornis longipes) had fallen from a population of around 3,000 to just 10 in recent years but today specialists from the World Conservation Union (IUCN) said no traces of the creature had been found during a recent survey in northern Cameroon.
"As a result this subspecies has been tentatively declared as extinct," said Dr Martin Brooks, the chairman of the African Rhino Specialist Group at the IUCN’s Species Survival Commission.
The sub-species, one of six types of rhino found in Africa, had been decimated by poaching for its horn, which is used as an aphrodisiac in Yemen and China. The long porous border between Chad and Cameroon, where the rhino enjoyed West Africa's savannah, prevented easy protection.