Dozens of elephant carcasses found near Botswana wildlife sanctuary

The video discusses the discovery of poached elephants during an aerial survey. Poachers attempted to hide the massacre by covering the carcasses with bushes. The organization suspects the elephants were poached for their tusks, as the skulls were removed. Data from the Great Elephant Census indicates that one-third of Africa's elephants have been killed in the past decade.

What does the Great Elephant Census report indicate about the elephant population?

What percentage of elephants in Africa were estimated to have been killed in the last decade?