BBotswana: Mystery elephant deaths caused by cyanobacteria
SUPPLIED
Toxins made by microscopic algae in water caused the previously unexplained deaths of hundreds of elephants in Botswana, wildlife officials say.
Botswana is home to a third of Africa's declining elephant population.
The alarm was raised when elephant carcasses were spotted in the country's Okavango Delta between May and June.
Officials say a total of 330 elephants are now known to have died from ingesting cyanobacteria. Poaching has been ruled out as a cause of death.
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