The Mentawai gibbon, scientifically Hylobates klossii and also known as Klosss gibbon, the bilou, or the dwarf siamang, is a primate found exclusively on the Mentawai Islands west of Sumatra, Indonesia. It is entirely black, resembling a siamang but considerably smaller and without a throat pouch, reaching 43 to 64 centimeters in length and weighing up to 5.9 kilograms; males and females are difficult to distinguish visually. Uniquely among gibbons, the sexes do not vocalize together, with males singing before sunrise and females after. It is listed as Endangered by the IUCN as of 2021 and included on CITES Appendix I, with a wild population estimated at 20,000 to 25,000 individuals that has declined by roughly half over the past two and a half decades.
Facts
Classification
System (Realm) Relationship to PeopleEcotourism and Research 2 Living or Extinct Scientific Name Conservation Status Comparison
CITES Appendix Connections
Child Taxon Of
Source Mentawai Gibbon (Wikidata)
In Biome
Source Animal Diversity Web, University of Michigan Museum of Zoology: Animal Diversity Web: Hylobates klossii
In the Other Atlases
Found In
Also in Geography Atlas: where this subject is found.
Sources
1. EltonTraits 1.0 (Wilman et al. 2014)
2. Animal Diversity Web, University of Michigan Museum of Zoology: Animal Diversity Web: Hylobates klossii
Animal Diversity Web, University of Michigan Museum of ZoologyHabitat Regions, Hylobates klossii
Habitat Regions tropical tropical terrestrial terrestrial
Conservation Status: CITES
CITES Appendix I
Economic Importance for Humans: Positive: "Kloss' gibbons are a potential source of ecotour"
Kloss' gibbons are a potential source of ecotourism dollars, as well as being important parts of a healthy ecosystem from which humans benefit.
In Biome: Tropical Rainforest, Habitat Regions, biome: rainforest
rainforest rainforest
View the Source 3. GBIF Species API
4. Mentawai Gibbon (Wikidata)
Wikidata- Wikidata Q570704 (P225 taxon name)
Statements section, conservation status (P141)
IUCN Red List conservation status (Wikidata property P141): endangered.
- Child Taxon Of: Hylobates, Wikidata P171 (parent taxon) claim, rank=normal, target=Q878467 (Hylobates)
View the Source 5. Wikipedia: Kloss's gibbon
Wikipedia- Category: Fauna listed on CITES Appendix I
Conservation section
Kloss's gibbon is classified as endangered by the IUCN (2021). Recent estimates conclude that there are around 20,000 to 25,000 Kloss's gibbons alive in the wild, and its numbers are declining. Over the last two and a half decades, the population size of Kloss's gibbon has fallen by 50%.
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