NAIROBI, Kenya — Iain Douglas-Hamilton, a British-born zoologist and conservationist who dedicated much of his life to protecting elephants , has died, his Save the Elephants group said Tuesday. He was 83.

Douglas-Hamilton was known for decades of conservation work, which included pioneering trackers and collaring to protect elephants against poaching and the illegal ivory trade. He died on Monday in Kenya, the statement said.

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