Sun Bear (Helarctos malayanus)

Mammal Bear Forest specialist

Overview

The sun bear (Helarctos malayanus) is the smallest of the world's bears, a compact and agile species of the tropical forests of Southeast Asia. Named for the pale crescent patch on its chest, it is an accomplished climber that spends much of its time foraging for insects, honey, and fruit.

Despite their small size, sun bears are strong, with large paws and long claws suited to tearing into wood and climbing. They are shy, largely solitary, and not often seen in the wild.

Conservation note: the sun bear is recognised as a species of conservation concern, affected by deforestation and other pressures. Verify the current status at iucnredlist.org before relying on it.

Classification

Taxonomic classification of Helarctos malayanus
Kingdom	Animalia
Phylum	Chordata
Class	Mammalia
Order	Carnivora
Family	Ursidae
Genus	Helarctos
Species	H. malayanus

The sun bear is the only species in the genus Helarctos, one of several genera within the bear family, Ursidae.

Habitat & Range

Sun bears live in tropical and subtropical forests across mainland Southeast Asia and parts of the islands of Sumatra and Borneo. They depend on forest with fruiting trees and abundant insects, and their strong climbing ability lets them use the canopy as well as the forest floor.

Diet & Feeding

Sun bears are omnivores that rely heavily on insects — particularly termites, ants, and bee colonies — and on honey, fruit, and other plant material. They use powerful claws to break open wood and nests and an exceptionally long tongue to extract insects and honey, which has earned them the nickname “honey bear” in some areas.

Behavior & Social Life

Sun bears are largely solitary and can be active by day or night. They are skilled climbers and may build rough nests or rest in trees. Largely quiet and secretive, they rely on a keen sense of smell to find food across the forest.

Appearance & Recognition

Sun bears have short, sleek black fur, a distinctive pale to orange chest patch, a broad muzzle, small rounded ears, and notably large paws with long, curved claws. Their small size, loose skin around the neck, and the chest marking make them easy to tell apart from larger bears.

Human Interaction & Conservation

The main threats to sun bears are loss of forest habitat and other pressures across their range. Conservation focuses on protecting forest, tackling illegal activity, and rehabilitating displaced bears. For current status and context, rely on authoritative sources such as the IUCN Red List.

More photos of the sun bear

Sun bear showing the pale chest patch, at Sepilok, Borneo. — Sun bear (Helarctos malayanus), Sepilok, Borneo.
Image: Charles J. Sharp, CC BY-SA 4.0, via Wikimedia Commons.

Sourced facts

Each value below is traced to the specific reference that states it. Open a row's evidence to see the source, where to look in it, and how firmly it supports the value. Sources checked 2026-10-09.

Sourced facts about the Sun bear, with the reference supporting each
Fact	What the source states	Evidence
Geographic range	From the eastern Himalayas to Szechuan (China), then south through Burma, parts of Indochina and the Malayan peninsula; the range is probably larger than known.The Geographic Range section does not mention Sumatra or Borneo, although the account cites a study of the species in Borneo under Ecosystem Roles.	Matches source · Animal Diversity Web — how we know Animal Diversity Web — University of Michigan Museum of Zoology Where Geographic Range Checked by FaunaHub 2026-10-09 Limits A peer-edited account written largely by students under faculty review. Figures are compiled from the literature rather than from a single study, and some are regional.
Habitat	Dense lowland tropical forests; commonly found climbing in trees.	Matches source · Animal Diversity Web — how we know Animal Diversity Web — University of Michigan Museum of Zoology Where Habitat Checked by FaunaHub 2026-10-09 Limits A peer-edited account written largely by students under faculty review. Figures are compiled from the literature rather than from a single study, and some are regional.
Diet	Opportunistic omnivores: bees, termites and earthworms make up most of the diet, plus fruit when available, and sometimes small rodents, birds, lizards and scavenged tiger kills.Long tongues help them take insects, termites and honey. Near people the diet may include rubbish, livestock and crops such as bananas.	Matches source · Animal Diversity Web — how we know Animal Diversity Web — University of Michigan Museum of Zoology Where Food Habits Checked by FaunaHub 2026-10-09 Limits A peer-edited account written largely by students under faculty review. Figures are compiled from the literature rather than from a single study, and some are regional.
Body size	Shoulder height 70 cm; head-to-tail length 1.2 to 1.5 m; tail 3 to 7 cm. Males are 10 to 20% larger than females.ADW gives no separate measurements for each sex.	Matches source · Animal Diversity Web — how we know Animal Diversity Web — University of Michigan Museum of Zoology Where Physical Description Checked by FaunaHub 2026-10-09 Limits A peer-edited account written largely by students under faculty review. Figures are compiled from the literature rather than from a single study, and some are regional.
Body mass	27 to 65 kg; males are 10 to 20% larger than females.The mass figure appears only in the account's data panel and is not broken down by sex. The 10 to 20% difference is stated for size in general, not for mass specifically.	Matches source · Animal Diversity Web — how we know Animal Diversity Web — University of Michigan Museum of Zoology Where Physical Description Checked by FaunaHub 2026-10-09 Limits A peer-edited account written largely by students under faculty review. Figures are compiled from the literature rather than from a single study, and some are regional.
Lifespan	In captivity, up to 24 years and nine months (24.75 years) by one figure, an average of 35.9 years by another; no wild lifespan is stated.sources disagreeThe account states no wild lifespan.	Sources disagree · Animal Diversity Web — how we know What each reading says 24.75 years (24 years and nine months) — Animal Diversity Web, captivity, longest recorded (prose and data panel) 35.9 years — Animal Diversity Web, captivity, 'average lifespan' (data panel, AnAge) The stated captive maximum (24 years and nine months, 24.75 years) is lower than the captive 'average lifespan' of 35.9 years that the same account cites from AnAge. An average cannot exceed the maximum. Animal Diversity Web — University of Michigan Museum of Zoology Where Lifespan/Longevity Checked by FaunaHub 2026-10-09 Limits A peer-edited account written largely by students under faculty review. Figures are compiled from the literature rather than from a single study, and some are regional.
Activity pattern	Active at night (nocturnal); does not hibernate, probably because food is available year-round in the tropics.They sleep and sunbathe in trees at heights of 2 to 7 m.	Matches source · Animal Diversity Web — how we know Animal Diversity Web — University of Michigan Museum of Zoology Where Behavior Checked by FaunaHub 2026-10-09 Limits A peer-edited account written largely by students under faculty review. Figures are compiled from the literature rather than from a single study, and some are regional.
Social structure	Solitary and sedentary; cubs stay with their mothers until fully grown.'Solitary' appears only as a Key Behaviors keyword; the prose does not describe adult social behaviour.	Matches source · Animal Diversity Web — how we know Animal Diversity Web — University of Michigan Museum of Zoology Where Behavior; Reproduction Checked by FaunaHub 2026-10-09 Limits A peer-edited account written largely by students under faculty review. Figures are compiled from the literature rather than from a single study, and some are regional.
Distinguishing traits	The smallest bears in the family Ursidae. The yellowish or white 'U'-shaped chest patch is highly variable and is completely absent in some bears.The coat is entirely black apart from the chest patch and a grey to faintly orange muzzle. ADW also notes sickle-shaped claws, naked soles and a walk with all four legs turned in.	Matches source · Animal Diversity Web — how we know Animal Diversity Web — University of Michigan Museum of Zoology Where Physical Description Checked by FaunaHub 2026-10-09 Limits A peer-edited account written largely by students under faculty review. Figures are compiled from the literature rather than from a single study, and some are regional.
Conservation status	Vulnerable (VU), global assessment, 2017	Matches source · IUCN Red List of Threatened Species — how we know IUCN Red List of Threatened Species Checked by FaunaHub 2026-10-09 Limits Read from the Red List export IUCN publishes to GBIF; iucnredlist.org itself does not answer automated reads. Categories are reassessed over time.

References for the facts above

UniversityAnimal Diversity Web — University of Michigan Museum of ZoologySupports: Range, habitat, diet, body size and mass, lifespan, activity and social structure, as the account states them. Retrieved 2026-10-09.Limitations: A peer-edited account written largely by students under faculty review. Figures are compiled from the literature rather than from a single study, and some are regional.
ReferenceIUCN Red List of Threatened SpeciesSupports: The global Red List category and the year of the assessment. Retrieved 2026-10-09.Limitations: Read from the Red List export IUCN publishes to GBIF; iucnredlist.org itself does not answer automated reads. Categories are reassessed over time.

Frequently Asked Questions — Sun Bear

Is the sun bear the smallest bear?

Yes. The sun bear (Helarctos malayanus) is the smallest of the living bear species. It is a compact, powerfully built bear adapted to climbing and foraging in tropical forest, quite different in size and shape from larger bears such as the brown or polar bear.

Why is it called a sun bear?

The name refers to the pale, often golden or orange, crescent-shaped patch on the bear's chest, which has been likened to a rising or setting sun. The pattern varies between individuals and can help with identification.

What do sun bears eat?

Sun bears are omnivores with a strong taste for insects — especially termites and ants — and honey, which they reach using powerful claws and an exceptionally long tongue. They also eat fruit and other plant material, and play a role in seed dispersal and forest health.

Are sun bears endangered?

Sun bears are recognised as a species of conservation concern, affected mainly by forest loss and other pressures across their Southeast Asian range. Because assessments change over time, verify the current status at iucnredlist.org.

Sources and further reading

Authoritative wildlife references used for general educational context. Conservation status should always be verified against current IUCN Red List data. External links open in a new tab.

UniversityAnimal Diversity Web — Helarctos malayanus (sun bear) — University of Michigan species account
ReferenceBritannica — Sun bear — Editor-reviewed encyclopedia entry
Wildlife referenceIUCN Red List of Threatened Species — Authoritative source for current conservation status