The number of black rhinos in Africa has decreased dramatically in the past century. Fewer than 2,500 black rhinos existed in 1995, a 98% drop compared to 1960.
The black rhino population has increased somewhat since then, and there are 5,000-5,400 black rhinos in the world today.
However, poaching and trafficking of rhino horns still prevents the species from recovering to early 20th-century levels. The WWF says rhinos are some of the oldest mammals in the world, and efforts to protect them benefit other species too, including elephants.