Career
He is president of the charity Survival International. They had two children, Lucy (b 1960) and Rupert (b 1970). Marika died in 1982. In 1968 he travelled on a British Broadcasting Corporation-funded expedition in the Amazon, having a discussion with the ethnobotanist Conrad Gorinsky that led to the foundation of the charity Survival International.
He became its first president
In 1971, he and Marika went on a three-month expedition, backed by Survival International, to visit and live among the Xingu people in Brazil, speaking with local people and studying their living conditions. In 1973, the Hanbury-Tenisons followed up their journey to Brazil with a three-month visit to Indonesia.
They made their last research trip together in 1979, when they visited Malaysia as part of a Royal Geographical Society scientific expedition.