Hundreds of elephants that died mysteriously in Botswana's famed Okavango Delta probably succumbed to natural toxins, the wildlife department said Friday.

The landlocked southern African country has the world's largest elephant population, estimated to be around 130,000. Around 300 of them have been found dying since March.

Authorities have so far ruled out anthrax, as well as poaching, as the tusks were found intact.

Preliminary tests conducted in various countries far have not been fully conclusive and more are being carried out, Wildlife and Parks Department boss Cyril Taolo told AFP in a phone interview.

"But based on some of the preliminary results that we have received, we are looking at naturally-occurring toxins as the potential cause," he said.

"To date we have not estabished the conclusion as to what is the cause of the mortality".

He explained that some bacteria can naturally produce poison, particularly in stagnant water.

Government has so far established that 281 elephants died, although independent conservationists say more than 350.

The deaths were first flagged by a wildlife conservation charity, Elephants Without Borders (EWB), whose confidential report referring to the 356 dead elephants was leaked to the media early in July.

EWB suspected elephants had been dying in the area for about three months, and mortality was not restricted to age or gender.

Several live elephants appeared weak, lethargic and emaciated, with some showing signs of disorientation, difficulty in walking or limping, EWB said.

Tests are being conducted at specialist labs in South Africa, Canada, Zimbabwe and the US.

South Africa cuts rhino poaching by half: minister
Johannesburg (AFP) July 31, 2020 –

The number of South African rhinos killed by poachers fell by half in the first six months of the year, but 166 were slaughtered nonetheless, the environment minister said Friday.

And the number of incidences has begun to edge higher again as coronavirus lockdown measures are eased, she added in a statement.

"During the first six months of 2019, 316 rhino had been poached in South Africa," said Barbara Creecy, the minister of environment, forestry and fisheries.

The figure represents a drop of nearly 53 percent.

"We have been able to arrest the escalation of rhino losses," Creecy claimed.

South Africa has for years battled a scourge of rhino poaching fuelled by insatiable demand for their horns in Asia.

Most of the demand emanates from China and Vietnam, where the horn is coveted as a traditional medicine, an aphrodisiac or a status symbol.

The ministry attributed its success in slowing the rate of poaching to a decade of various strategies and supply chain disruptions that stemmed from national travel restrictions during a national coronavirus lockdown.

The famed Kruger National Park reported that 88 rhino had been killed during the first six months of 2020.

But Creecy warned that since lockdown restrictions have been gradually lifted and game parks reopened, so too has rhino poaching slowly increased.

In the three months from when a lockdown was implemented on March 27 until the end of June, 46 rhinos were killed across the country, she said.

Rhino horn is composed mainly of keratin, the same substance as in human fingernails.

It is normally sold in powdered form and touted as a cure for cancer and other diseases.