LIMPOPO PROVINCE, South Africa — The baby rhino, an orphan, had barely been weaned. Her horn was only a few inches long. But that didn't stop the poachers from hacking it off.

David Uys, 33, had helped raise the rhino after her mother was killed by lightning. He called her Weerkind — orphan in Afrikaans. He won't forget the sight of the bodies of the baby and two other rhinos, shot dead, their horns removed.

"I'm not a one for talking about emotions," Uys said. "But it was like seeing one of your family members dead, the brutality of it."

The slain bull rhino, dubbed Longhorn, was about 35 and had a magnificent horn more than 2 feet long. The third rhino, Sister, had adopted Weerkind after her mother was killed. The three died together in November on this Limpopo province game ranch that is for tourists, not hunters, north of Pretoria.

"You're angry. You're furious. You're sad. You're crying," said Uys, the ranch manager. "Just a bundle of emotions, bursting inside."

A sharp upsurge in rhino poaching in South Africa and Zimbabwe by organized crime gangs has devastated Zimbabwe's rhino population and threatens to wipe out South Africa's critically endangered black rhinos within a decade.

South African rancher Pelham Jones warns that the more common white rhino won't be far behind unless something is done.

A report last year by the World Wildlife Fund, the International Union for Conservation of Nature and wildlife-trade monitoring network TRAFFIC said poaching had reached a 15-year high, pushing the animals close to extinction. About 1,500 rhino horns were traded illegally in the past three years, despite a long-standing ban on international trade.

Last year, 122 rhinos were killed in South Africa. Jones predicted that at the current poaching rate, 180 to 200 will be killed this year. A provisional 2009 estimate shows only 800 rhinos remaining in Zimbabwe; and 18,553 white and 1,570 black rhinos in South Africa, according to the Convention on International Trade in Endangered Species of Wild Fauna and Flora, or CITES, which maintains the ban on the trade of rhino horn.

Rhino ranchers, some of whom keep the animals to attract tourists while others rely on limited trophy hunting, are so wary about the involvement of organized crime in rhino killings that few are willing to talk publicly for fear of endangering animals on their properties. Interviews are given on condition that properties, even nearby towns, are not identified.

The ranch where Weerkind was born and killed is a lush green in the summer rainy season, with rocky hills looming into the sky. Birds with impossibly long tails seem weighed down in flight as they flutter near a pond. A red track cuts uphill through the acacia trees. Rain clouds gather, thunder grumbles, and a sudden drenching rain pours down, stopping abruptly half an hour later.

Up close, the rhinos look benign, almost bovine, ambling in the Limpopo sunshine, plucking grass, shadowed by a group of guards in camouflage carrying semiautomatics. Their small, thick-lashed eyes look sleepily docile. But their sheer size is awesome — a rhino is almost as big as a car, weighing from 2,000 to 3,000 pounds. From a few yards away, they are terrifying.

Not for Uys, even though he's been charged countless times and once was knocked over and walked on.

Uys has spent his life with rhinos. At 18, he was a rhino guard, sleeping in the bush with them through violent summer thunderstorms and harsh winter nights.

"I was close enough to scratch their ears. They took me as part of the group," he said.

Game rancher Jones, who leads an action group of rhino owners to combat poaching, said incidents are being reported every other day.

His phone beeps constantly with text messages alerting him to poaching incidents and sightings of suspected poachers.

"There's another one," he said, grabbing his phone.

The police, he said, are little help. In one recent case, they arrived four days after a group of rhinos was killed. In another case a police officer picked up an ax abandoned by poachers, destroying any fingerprints.

The South African government disbanded the police force's endangered species unit in 2003. The government last year promised to bring back a special investigations unit — but critics believe it's not enough to make a difference.

"This is our cultural heritage," Jones said. "People come to South Africa to see the Big Five, not the Big Four," he added, in a reference to South Africa's five biggest wildlife draws: rhinos, elephants, lions, leopards and cape buffalo.