Gehan de Silva Wijeyeratne is amongst a tiny handful of field naturalists in the world who have written and photographed field guides spanning terrestrial mammals, marine mammals, birds, butterflies, dragonflies, wild flowers and trees. He is a passionate naturalist who through 15 books and over 380 articles has drawn attention to how rich Sri Lanka is for wildlife. In the words of British author and television wildlife presenter Bill Oddie, no single individual has done so much to raise the profile of a country for its wildlife. Gehan's efforts have made him a wildlife celebrity in Sri Lanka. He is on the council of the London Natural History Society and is Chair of the London Bird Club, one of its sections. He is also a Trustee of the British Ornithologists' Club.