Gazetted in 1994, the 1379 ha Tanjung Datu National Park, at the western-most tip of Sarawak, is the smallest national park in the state of Malaysia. Nonetheless, the park is a rich reservoir of biodiversity, from beautiful coral reefs to pristine rainforests and beaches. The fauna includes representatives of lowland mammals (such as gibbon, deer and small carnivores), birds comprising many spectacular species (including the Argus Pheasant and several hornbill species), many interesting species of amphibians and reptiles (including sea turtles), several frogs and lizards believed to be undescribed, stream macroinvertebrates and a diverse flora, including the world’s largest flower, Rafflesia. Several frogs and lizards are believed to be undescribed. This volume represents the results of a scientific expedition to the Park, organised between 7 to 13 April 2014, by Universiti Malaysia Sarawak and Sarawak Forestry Corporation. It reveals Tanjung Datu National Park as an exciting field site for researchers. and an absorbing one for the ecotourist as well as casual visitors, with much to do in terms of viewing nature, outdoor activities, homestays and traditional activities.