ABOVE: Google satellite view of the coral atolls of Pulau Maratua and Pulau Kakaban, East Kalimantan.
Pulau Maratua and the smaller Pulau Kakaban are two of the 31 Derawan Islands off the coast of East Kalimantan. These islands were originally the cones of extinct volcanoes. Coral reefs grew on the cones as the land sank eventually resulting in atolls. The largest island Maratua has a unique fauna and flora with at least two endemic birds and many endemic plants. There is a rich fig flora including Ficus glandifera and Ficus concinna which are very rare elsewhere in Borneo.
Ficus caulocarpa sapling growing on a coconut stump on Maratua. Note the long red petioles (leaf stalks), typical of Ficus caulocarpa.