Unlike most of the Philippines, Palawan is biogeographically part of Sundaland, with a fauna and flora related to that found in Borneo.[21]
Among the many endemic species are the Palawan Peacock-pheasant, Philippine Mouse-deer, Philippine Pangolin and Palawan Bearded Pig. In the forests and grasslands, the air resonates with the songs of more than 200 kinds of birds. Over 600 species of butterflies flutter around the mountains and fields of Palawan, attracted to some 1500 hosts plants found here. Endangered sea turtles nest on white sand beaches.[22] Dugong numbers have fallen seriously, although Palawan still has a larger population than any other part of the country[23] and organizations such as Community Centred Conservation (C3) are working to end the unsustainable use of marine resources in Palawan and in Philippines