Evenings are spent under the stars: consolation, surely, for not seeing a black rhino.
Their voracious appetites may also put them in competition with other big animals like the endangered black rhino.
Meanwhile, efforts like those at Imire have certainly stopped the black rhino's decline.
Over the next 20 years, thousands of black rhino were slaughtered across Namibia.
The Scottish wildcat was now much rarer than the black rhino, he said.
Step into the Ark's ground-level, wildlife-viewing room and you may find yourself within steps of a black rhino, easily photographable through the thick window.
Today, Kunene has the largest number of free-roaming black rhino in the world -- the only rhino worldwide living on communally- and traditionally-owned land without formal conservation status.
Spotting a rare, black rhino can be a real challenge, but this does not seem to worry Chris Bakkes, the manager of Desert Rhino Camp, which runs rhino safaris.
In Botswana and Zambia, the black Rhino is believed now to be extinct and, across a wide band of Africa, both black and white rhinos are now almost too rare to be counted.
There are currently 4, 500 of the critically endangered black rhino (Diceros bicornis) spread across southern African nations - a shocking decline from the 1980s when 75, 000 of the mammals were mostly found in Zimbabwe.
If the Ravens win, the San Francisco zoo has agreed to re-name the enclosure of its black rhino "Boone, " who is named after the 49ers offensive tackle Alex Boone, in honor of the Ravens.
Professor du Toit, director of the Mammal Research Unit at Pretoria University, says commercial white-owned farms in Zimbabwe are home to many rare large mammals, including cheetah, black rhino and sable - a type of antelope.
In this desert region of flat-topped mountains, russet hills, gravel plains and swathes of scrubland, the black rhino are not tagged or tracked by satellite, nor are their movements restricted by the boundaries of a huge game reserve.
Despite having survived as a species for at least 50 million years, black and white rhino have been hunted to near-extinction because of their horns.
In the acacia-dotted savannahs of the Solio Private Reserve, beneath the snow-capped horn of Mount Kenya, we were hoping to catch a glimpse of a solitary black or white rhino tending to its young.
The U.S. Fish and Wildlife Service and Justice Department have launched "Operation Crash" using undercover agents and electronic surveillance in an effort to stop the black market trade in rhino horns, which has led to poaching and has reduced the world's rhino population by more than 90 percent since 1970.
But demand for rhino horns and the prices paid for them on the black market have soared in recent years, US prosecutors said.
Police said experts fear the rhino's horn could be ground down to use in black-market Chinese medicine.
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