My friend and former PhD supervisor David Chivers, who has died aged 81, was an expert on the lesser apes or gibbons, and a primatology lecturer for more than 40 years at Cambridge University while also carrying out research in the forests of south-east Asia and elsewhere.
Most of his 50 PhD students were from countries where wild primates can be found. They often went on to lead conservation projects in their own countries, training others and setting up reserves to save whole ecosystems containing primates and thousands of other wild species.
