Endangered
Kloss's gibbon
Hylobates klossii
Kloss's gibbon, also known as the Mentawai gibbon, the bilou or dwarf siamang, is an endangered primate in the gibbon family, Hylobatidae.
Appearance
It is identifiable in that it is all black, resembling the siamang with its black fur, but is considerably smaller and lacks the siamang's distinctive throat pouch.
Kloss's gibbon reaches a size 17 to 25 inches (43 to 64 cm) and weigh at most 13 pounds (5.9 kg).
Range and habitat
Kloss's gibbon exclusively lives on the Mentawai Islands that lie to the west of Sumatra. The Mentawai Islands consist four main islands that are part of an island archipelago. It is a diurnal inhabitant of the rain forest that hangs in the trees from its long arms and rarely comes to the ground.
Native peoples of the Mentawai Islands kill Kloss's gibbon and other endemic primates for subsistence, and also participate in poaching activities. Globalization and industrialization in the Mentawai Islands are contributing toward the degradation of high quality habitat needed by Kloss's gibbon.
Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.
Diet and breeding
Kloss's gibbons diet consists of fruit, leaves, shoots, and insects. Kloss's gibbons are monogamous, and male Kloss's gibbons use territory to attract and court possible mates.
During courtship, males and females defend territory together, and mating only occurs after the females deems the male capable of defending a suitable territory.
In crisis
Kloss's gibbon, also known as the Mentawai gibbon, the bilou or dwarf siamang, is an endangered primate in the gibbon family, Hylobatidae. Kloss's gibbon is in jeopardy of going extinct. Kloss's gibbon is classified as endangered by the IUCN (2021).
Over the last two and a half decades, the population size of Kloss's gibbon has fallen by 50%. There are several threats that pose significant risk to Kloss's gibbon.
CITES lists this taxon on Appendix I. Confirm the current appendix on the CITES checklist.
Kloss's gibbon is Endangered on this catalog because that is the IUCN category stored on Wikidata. Confirm the official criteria and any later count on iucnredlist.org.
Sources
Written for this catalog from the English Wikipedia article on Kloss's gibbon, Wikidata item Q570704. Family and order context is original field-guide writing about the group, not a copied assessment of this one species. Wikipedia text is CC BY-SA. Not an IUCN assessment. Counts, when quoted, can change — confirm them on the recovery programme and on iucnredlist.org.
