CRCritically EndangeredPartial review

Sumatran Rhinoceros

Dicerorhinus sumatrensis

Sumatran rhinoceros (Dicerorhinus sumatrensis), a small, hairy two-horned rhino.

Sumatran rhinoceros (Dicerorhinus sumatrensis) at the Sumatran Rhino Sanctuary, Indonesia.

Image: 26Isabella, CC BY-SA 3.0, via Wikimedia Commons.

At a glance

IUCN category
CR · Critically Endangered
Animal group
Mammals
Population trend
Decreasing
Last verified

Conservation overview

The Sumatran rhinoceros is the smallest living rhino and the only Asian rhino with two horns. Notably hairy, it is a relative of the extinct woolly rhinoceros. It is assessed as Critically Endangered.

It survives only in small, scattered rainforest populations, which makes finding mates very difficult.

Range & habitat

Survives only in small, scattered rainforest populations on Sumatra and Borneo, Indonesia.

Major threats

Threats below are drawn from the authoritative sources listed on this page. For the current, complete assessment, see the IUCN Red List.

  • Very small, fragmented populations with few breeding opportunities
  • Historical poaching for horn
  • Habitat loss and isolation

Why it matters

As a browsing forest rhino, it helps shape rainforest vegetation, and its survival now depends on bringing isolated animals together to breed.

A Sumatran rhinoceros showing its hairy hide and folded skin.

Sumatran rhinoceros (Dicerorhinus sumatrensis); a captive individual.

Image: Charles W. Hardin, CC BY 2.0, via Wikimedia Commons.

Sources

Sources for Sumatran Rhinoceros

Frequently Asked Questions

Why is the Sumatran rhinoceros Critically Endangered?
Published assessments cite very small, fragmented populations with few breeding opportunities, a history of poaching for horn, and habitat loss. See the IUCN Red List for the current assessment.
What makes the Sumatran rhino unusual?
It is the smallest rhino, has two horns, and is covered in coarse hair — features that link it to the Ice Age woolly rhinoceros.

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