Primates
Hylobates klossii (Bilou or Little Gibbon)
Bilou is the most famous primate species in the Mentawai. Anatomically including agile gibbon species oldest surviving with a rare feathers dusky black, and the membrane between the second and third fingers. Screeched screeches Bilou simplest among agile gibbon, longer, varied and not conducted by the agile gibbon and other.
Bilou live in groups consisting of male and female parent with children who are minors. Bilou including animal monogamy with an average family of three to four individuals, while the number of members in one group can be reached 11 individuals.
Bilou is a primate species that spend most time on top of tall tree (over 20 meters) with its preferred food is the Ficus sp, Nibung lianas and stems. Bilou rarely drop to the ground, including a wildlife movement due to many use long arms to move / jump from one tree to another making it difficult to move in the soil surface. Thus it is clear that Bilou are primates whose lives were most affected by logging activities.
Presbytis potenziani (Joja or monkey Mentawai)
Joja have the most beautiful forms of primates endemic, with shiny black, the abdomen dark brown, white around the face and neck and long tail and black as silk.
Although included in a large genus of tropical Asia and spread widely, Joja is unique in many ways. Adult female and male partners participated in the demonstration shriek and a challenge to other groups, unlike other agile gibbon, and langur species, because only males who do both. Joja usually made sounds before dawn and taken as a sign the group territory so that other animal groups to avoid.
Joja most of his life living in trees and seldom come down to the ground. Their food consists of half a fruit, leaves 35% and 15% grains, nuts, flowers and other plant material.
Simias concolor (simakobu)
This includes family bekantan monkey (the same group are in Kalimantan). Simakobu very different from bekantan and all other forms of monkeys because of the short tail-like pig tails, body fat and body members of the same length and there are two types of coat color of dark grey and golden. Simakobu live in trees and eat leaves.
Simakobu live in a group consisting of 1 female, 1-5 male adults and children. Adult males have larger size of adult females and have canine teeth more than twice the length of an adult female canines.
Simakobu very easily hunted, a Simakobu often run away in just a short distance and then sat hiding in the canopy so that it becomes an easy target for hunters. Simakobu hunted two times more than other types. If one group fled, the female will be left behind so that the female type Simakobu more often killed than in males.
Macaca pagensis (Bokkoi or monkey Mentawai)
Bokkoi very closely related to the monkey that is in Sumatra, Kalimantan and Southeast Asian continent, but has a darker coat color that contrast with the white cheeks and yelled unique. Monkey usually live on large islands, and very unusual turns Bokkoi live on small islands such as Pulau Siberut.
Bokkoi also made sounds before dawn but did not show shriek territories. Bokkoi male repeatedly cries out so keep in touch with group members who also responded with screams and the sounds they used to spend to keep in touch one another in dense forest. Bokkoi group consisted of 30 individuals, usually consisting of 80-10 individuals with a male alone in the lead. The group was divided into small groups to find food and re-join the group at the time each night.
Bokoi wear a wider area of habitat, from the mangrove area into dipterocarpaceaae primary forest, to the area to be harvested and farm fields where they often find food, so at least investigated for a wide area. Bokoi primates are the most delicious meat and some areas most often killed
Mammals
Species that are most attracted the attention of the fauna on the island of Siberut are mammals. There are about 28 species of mammals, 65% of them are endemic at the genus level, species and subspecies. Among the 28 species of mammals, the group of primates is a major concern because there are four types of primates that are endemic in the Mentawai. Found as many as 7 species of squirrels, 5 of which are endemic species are: Callosciurus melanogster, Sundasciurus fraterculus, Lariscus obscurus, Iomys Sipora and Hylopetes Sipora.
Three species of rats in Siberut is a subspecies endemic to the Mentawai islands namely Rattus tiamonicus mentawi (commonly found in homes and forest edge), Rattus surifer pagensis (live in primary forest, colorful body and brown around the neck, black back, abdomen white and both sides of the upside-down and the legs dark yellow), Ratus sabanus siporanus (found in primary forest, black top and white on the bottom).
Siberut has only three carnivores, two species of civet is endemic at the subspecies and one species of otter (Aonyx cinerea). Weasel who lived on Siberut are very different than the weasel which are common in Sumatra. None of the features found in civet that lives in Siberut so-called primitive ferret. Two species of weasels are: Paradoxurus hermaproditus siberu and Hemigalus derbyanus Sipora
The largest mammals living on Siberut is Sambar (Cervus unicolor Oceanus). These animals are often hunted when they're in the vicinity of the village or be hunted using snares in the forest.
Marine mammals in the waters of Siberut island consists of whales, spotted dolphins (Stenella longirostris, Delphinus sp and Grampus sp) which is often seen around the east coast of Siberut and dugongs (Dugong-dugon), which is very rarely found in waters east coast.
Bird
Siberut Island there are many birds. From 106 species of birds are, 13 species (12%) of them including endemic subspecies level. The only bird species endemic to this island is Celepuk Mentawai (Otus Mentawai ). SNP inventory (2000) recorded 134 species of birds in Siberut.
Birds that occupy forest stratification profile, in which the main canopy tree-dwelling (> 25 m) among other hornbills, eagles, crows, parrots, etc.. The inhabitants of the mid-canopy (10-25 m) inhabited by doves, finches, etc. Srigunting. In the lower canopy (4-10 m) occupied by the birds honey, magpie, lathe etc. Birds that are heavily traded parrot (Gracula religiosa batuensis) and magpie stone.
Insect
Based on the results of the inventory of insects by SNP in 1999, then identified 45 that included family into 11 orders. Then Siberut contained in 29.4% and 5.9% of the order of insects that have family in the world. These orders are Diptera comprises five tribes, comprising four Orthopterid tribe, a tribe consists Dermaptera, Hymenoptera comprised five tribes, comprising 11 tribes Coleoptera, Hemiptera comprised four tribes, Lepidoptera comprising nine tribes, Phasmida comprised a tribe, comprised four tribes and Odonata Isoptera consists of 1 clan.
Siberut NP inventory Hall in 1999, found 12 families of butterflies which consists of 45 genera with 60 species of butterflies. Of these species there is a type that is endemic to the Mentawai Islands is Chyntia Sipora of the family Nymphalidae. Currently, a butterfly does not have economic value but in the era-80 lots of foreigners who buy a butterfly in the community, especially the Japanese.
Reptil, Fish and Amphibians
According to the article A. Whitten, J. Dring and Mitchell (1982), there are 21 types of amphibians on the island of Siberut and one of them is endemic frog species of Rana signata Siberut. While there are 62 types of reftil and 3 of them are endemic species of snakes and Oligodon Calamaria klossii sp. of the tribe and Boiga nigriceps brevicauda Colubrinae of interest Boiginae.
Reftil tribes are Gekkonidae / 6 species of geckos, Varadinae / iguana a species, Scincidae / Lizard 7 species, Columbrinae / 11 species of snakes, Boidae / Python 2 species, Xenopeltidae / snake a species, Natricinae / Snake water 2 species, Agamidae / water 8 species of lizards, Boiginae / 7 species of snake, Elapidae / 2 species of venomous snakes, Viperidae / 5 species of poisonous snakes, Testudinidae / 2 species of turtles, Cheloniidae / 2 species of sea turtles, Dermochelyidae / a leatherback sea turtle species, Crocodylidae / crocodile One species, Homalopsinae / 1 species of sea snakes, Sibynophinae / snake species and Pareinae 1 / 2 snake species.
