 In his 48-year-long career, Baig made over 300 documentary films, studying the flora, fauna, and history of Pakistan as well as of Central Asia.His films on wildlife, "Lakes of Sindh", "Wildlife in Sindh", "Game Warden" and " Life in Stone" won major acclaim, as did the TV series "Sailani Ke Saath," which ran on Pakistani television in the 1970s for nearly three years.Obaidullah Baig championed nature and environmental causes.