Fauna of Indonesia has a high diversity because of vast territory and the shape of tropical islands. High diversity is caused by the Wallace Line, divides Indonesia into two areas; zones zoogeography Asia, which is influenced by the fauna of Asia, and Australasia zoogeography zone, influenced by the fauna of Australia. Mixing fauna in Indonesia is also influenced by a variety of ecosystems including: beaches, dunes, estuaries, mangroves, and coral reefs. The bridge between Asia and Australia formed by the archipelago is reflected in the varieties of animal life. The fauna of Sumatra, Kalimantan, and Java is similar to that of Peninsular Malaysia, but each island has its peculiar types. The orangutan is found in Sumatra and Kalimantan but not in Java, the siamang only in Sumatra, the proboscis monkey only in Kalimantan, the elephant and tapir only in Sumatra, and the wild ox in Java and Kalimantan but not in Sumatra. In Sulawesi, the Maluku Islands, and Timor, Australian types begin to occur; the bandicoot, a marsupial, is found in Timor. All the islands, especially the Malukus, abound in great varieties of bird life, reptiles, and amphibians. The abundant marine life of Indonesia's extensive territorial waters includes a rich variety of corals.
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| Proboscis Monkey (Bekantan) from Borneo |
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| Komodo from NTT |
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| Orang Utan from Kalimantan |
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| Kaka Tua Putih from Maluku |
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| Siamang from Sumatera |
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| Badak Bercula Satu from Ujung Kulon Java |
The flora of Indonesia consists of many unique varieties of tropical plants. Blessed with a tropical climate and around 18,000 islands, Indonesia is a nation with the second largest biodiversity in the world. The flora of Indonesia reflects an intermingling of Asian, Australian and the native species. This is due to the geography of Indonesia, located between two continents. The archipelago consists of a variety of regions from the tropical rain forests of the northern lowlands and the seasonal forests of the southern lowlands through the hill and mountain vegetation, to subalpine shrub vegetation. Having the second longest shoreline in the world, Indonesia also has many regions of swamps and coastal vegetation. Combined together, these all give rise to a huge vegetational biodiversity. There are about 28,000 species of flowering plants in Indonesia, consisting 2500 different kinds of orchids, 6000 traditional medicinal plants used as Jamu., 122 species of bamboo, over 350 species of rattan and 400 species of Dipterocarpus, including ebony, sandalwood and teakwood. Indonesia is also home to some unusual species such as carnivorous plants. One exceptional species is known as Rafflesia arnoldi, named after Sir Thomas Stamford Raffles and Dr. Arnold, who discovered the flower in the depths of Bengkulu, southwest Sumatra. This parasitic plant has a large flower, does not produce leaves and grow on a certain liana on the rain forest floor. Another unusual plant is Amorphophallus titanum from Sumatra. Numerous species of insect trapping pitcher plants (Nepenthes spp.) can also be found in Borneo, Sumatra, and other islands of the Indonesian archipelago.
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| Rafflesia Arnoldi from Bengkulu |
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| Amorphopalus Titanum from sumatera |
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| Black Orchid from Kalimantan |
