Decree of the minister of Forestry No 589/Kpts-II/1996
September 16, 1996
Technical implementation Unit
BKSDA Nusa Tenggara Timur
Which was originally a marine area that was designated as a Nature Reserve by Decree of the Minister of Forestry No.427 / Kpts-II / 1987, Dated December 28, 1987, With Area 11,900 Ha, Then Appointed Back in 1996 Which divided into 2 Regions With the Decree of the Minister of Forestry No.589 / Kpts-II / 1996, September 16, 1996 Becomes a Natural Park of Tujuh Belas Pulau of 9.900 Ha and Riung Nature Reserve 2000 Ha.
Riung Nature Reserve area is representative of dry forest ecosystem type with mixed vegetation and mangrove forest.
The types of flora in the Riung Nature Reserve include waru (Hibiscus tiliacius), ketapang (Terminalia catappa), pecan (Aleurites molucana), kepuh (Sterculiafoetida), pandan (Pandanus tectorius), sandalwood (Santalum album), teak (Tectona grandis ), keloh (Cassia siamea), mango (Mangivera indica), acid (Tamarindus indica), sengon laut ), ampupu (Eucalyptus urophylla), as well as species of mangroves such as Rhizophora sp, Bruguiera gymnoriza, and Sonneratia sp.
Birds: wild chicken (Gallus galus), crocodile (Crocodylus porosus), as well as various species of birds such as eagle (Elanus sp), parrot (Cacatua sulphurea), bluwok or white stork (Egretta sacra), glawe or black cauldron (Ciconia episcopus ), tekukur (Streptopelia chinensis) parrot (Lorius domicella), birds or wontone birds, (Megapodius reinwardtii), …
Reptile: green turtle (Chelonia inydas), monitor lizard (Varanus tiniorensis), giant Komodo dragon or known by the local area mbou (Varanus komodoensis), …
types of marine life such as dugongs (dugong dugon), dolphins, and whales (Physister catodon) as well as various ornamental fish that, live on the rocks.