In 1978, with the outbreak of civil war in Chad, Clive and his wife Marie-Thérèse Rüttiman moved to Arusha, Tanzania, where he was appointed to a new position with the FAO, with the mandate to continue working on Quelea throughout eastern Africa.

Although this post was based in Rome, it involved numerous field trips and overseeing projects intended to control migratory pests such as the locust,[5] armyworm, and Quelea.

[7] In 2006 Clive retired to Oxfordshire, where he continued to undertake ornithological projects for the FAO and remained active as a consultant[8][9] and a recognized authority on African bird pests.

His friends will remember him for the image that he embodied of an open-minded eccentric English gentleman, a lover of Africa, for his disregard for what he considered to be outmoded convention, and for his often mischievous humour.

Once, after a couple of days’ absence to undergo a series of minor skin operations, he returned to his FAO office in Rome with an impressive row of stitches on his head, announcing to his appalled staff that he had just undergone major brain surgery.