This book provides an updated information on the selected ecological and biodiversity wealth in the fascinating land of Malaysian Borneo. The high complexity of tropical rainforest offers various niches that can house the mega diversity of flora, fauna, and microorganisme in this land. Individual chapters showcase recent findings on the various topics related to the ecology, taxonomy, and diversity of the selected flora and fauna on this island. This book will be a useful baseline data for public, biologists, related goverment agencies and other important stakeholders, in managing and protecting the resources of this magnificent tropical rainforest.