David Macdonald is a famous animal behaviorist in Oxford University, with profound theoretical accumulation and rich field investigation experience. Since 15, he has made unremitting efforts in the research of red fox and achieved fruitful results, so he is famous all over the world. He has produced many audio-visual products and books about mammals, and is also one of the main authors of the popular science monograph "Dolphin Smile" recently published by Exploration Publishing Company.