SOUTHERN WHITE-CHEEKED GIBBON
Nomascus siki
DESCRIPTION
Southern White-cheeked Gibbon (Nomascus siki) is commonly known as the Siki Gibbon and is characterized by its distinctive black fur and white cheek patches. This species exhibits a high degree of sexual dimorphism, with males being entirely black and females having lighter fur that can range from golden to brown. They are arboreal and highly social, often found swinging through the trees in their forest habitats, where they communicate using a variety of vocalizations.
FUN FACTS
- Southern White-cheeked Gibbons are known for their impressive vocal abilities, often singing in duets with their partners to strengthen their bond and establish territory
- Their calls can carry over several kilometers, making them one of the loudest primates in the forest
- | These gibbons are highly agile and can leap distances of up to 10 meters between branches, showcasing their incredible adaptations for life in the trees
- Their long arms and lightweight bodies allow them to swing effortlessly through the canopy, making them one of the most acrobatic primates
QUICK INFO
Lifespan20-25 years in the wild, up to 30 in captivity
Average Weight6-10 kg
Average Length50-70 cm
Diet TypeHerbivore
Social StructureThey typically live in small family groups consisting of a mated pair and their offspring.
Activity PatternDiurnal
Breeding SeasonYear-round, with peaks depending on local conditions
- Habitat
- Southern White-cheeked Gibbons inhabit tropical and subtropical forests, often in hilly or mountainous regions. They are highly adapted to life in the trees, spending most of their time in the canopy.
- Biomes
- Tropical Rainforest
- Native Range
- They are native to the forests of Southeast Asia, particularly in Vietnam and parts of Laos and Cambodia.
- Continent
- Asia
- Countries
- Vietnam, Laos, Cambodia
- Diet
- They primarily consume fruits, leaves, and flowers, showcasing a preference for ripe fruits when available.
- Diet Type
- Herbivore
- Favorite Food
- fruits, leaves, flowers
- Social Structure
- They typically live in small family groups consisting of a mated pair and their offspring.
- Activity Pattern
- Diurnal
- Group Size
- 2-6
- Territorial
- 1
VU
6-10 kg
Weight
50-70 cm
Length
- Coloration
- Males are black, while females have lighter fur that can be golden or brown.
- Sexual Dimorphism
- Males and females have distinctly different coloration.
- Lifespan
- 20-25 years in the wild, up to 30 in captivity
- Gestation Period
- 210 days
- Offspring per Birth
- 1
- Sexual Maturity
- 4-5 years
- Breeding Season
- Year-round, with peaks depending on local conditions
EN
Endangered
IUCN Red List Status
- Population Status
- The population is currently declining due to habitat loss and hunting.
- Wild Population Estimate
- Less than 10,000
- Population Trend
- Decreasing
- Endangered
- 1
- Threats
- Main threats include deforestation for agriculture and logging, as well as hunting for the illegal pet trade. These pressures have significantly reduced their habitat and population numbers.
- Predators
- Large birds of prey and possibly large snakes; however, they have few natural predators due to their arboreal lifestyle.
- Defense Mechanisms
- They rely on their agility and speed to escape threats, often using the dense canopy for cover.
- Compatible Animals
- Other gibbon species, small monkeys
- Found in Zoos
- Uncommon