Quinn Swales was leading a walking safari in Hwange National Park when he spotted six lions yesterday, police spokeswoman Charity Charamba said today.
"One of the lions had cubs and they became hostile. Mr Swales at first managed to scare the lions away but then the male lion later made a U-turn and attacked him," Charamba told The Associated Press. None of the tourists was harmed, she said.
The lion, named Nxaha, attacked Swales, the parks authority said. The lion had a collar that allowed researchers to track his movements.
The killing of Cecil in July by dentist James Walter Palmer just outside Hwange park sparked outrage in the United States. Cecil was also collared for an Oxford University study.
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Camp Hwange, the safari company that employed Swales, said the 40-year-old guide succumbed to the injuries on the same day he was attacked.
Camp Hwange's Facebook page says it offers game drives and game walks where "game likely to be encountered include all of the cat family, wild dog, elephants and buffalo in huge numbers."
Swales was an experienced professional with an excellent reputation in the safari community.
On the Camp Hwange Facebook page, where a statement of Swales' death was posted, one user who went on a 10 kilometer (6 mile) walking safari led by Swales said: "After we left Hwange, our group talked about who we would want near if the end of the world ever came. Quinn was top of the list."
"I don't recall any such incidents of an unprovoked attack around the Hwange area in the last 30 to 40 years," said Lane.
"This is no reason to stop walking safaris. It's been going on for years and it is a great experience. It is very popular, highly sought after."
In a separate incident in Zimbabwe, the parks authority said a man who sold curios to tourists was killed by an elephant in the resort town of Victoria Falls, about 100 kilometers (60 miles) from Hwange, also yesterday.