Though he looks like a Beatle with his shaggy hair and steel-rimmed glasses. Harvey Croze, 28, is concerned only with the music of the forest. The Oxford-trained zoologist has spent the past three years listening to and looking at elephants in Tanzania's Serengeti National Park. He explains his passion for pachyderms: "The elephant is second only to man as a modifier of ecology. He has been around for 15 million years and is the biggest land mammal, but we hardly know anything about him."
Croze, a member of the Serengeti Research Institute, has plenty of company in his pursuit of knowledge about...