At Ziwa ranch, a former cattle farm, there are now 48 rhinos – the only ones in the country living in their natural habitat.

For years, officials and experts have said there were “fewer than 80” Sumatran rhinos (Dicerorhinus sumatrensis) left in the wild. This figure has been used both by the Indonesian government and ...

Numbers of northern white rhinos were so low (today, there are only two left in the world, both females) that the native subspecies could not be reintroduced. No one fully expected what happened next.

They are different not in color but in lip shape. The black rhino has a pointed upper lip, while its white relative has a squared lip. The difference in lip shape is related to the animals' diets.

But just how in danger are they? There are now around 5,500 black rhino and 18,000 white rhino left in the world – the majority of which live in South Africa. Estimates suggest there are five ...