Sumatran Orangutan

scientific name

Pongo pygmaeus abelii

size

Weight. male 130-200 lbs. " female 90-120 lbs.
Height. male 4½-5' " female 3'8"
males much larger than females (sexual dimorphism)

characteristics

Adaptations/Coloration. fur shaggy red " male face flanges dark
Brain. large " highly intelligent
Feet. similar to hands " used for grasping
Laryngeal Sacs. large " used for long-distance calls
Movement. long arms & erect posture for brachiation

behavior

diurnal " arboreal (old males mostly ground-living)
Face Flaps. male use in dominance display
Group. solitary due to dispersion of food resources " alone except when mating or mother with young
Nests. built for sleeping

reproduction/life span

Life span. wild 35 yrs " captivity 50 yrs
Birth Interval. 7-8 yrs
Gestation. 233-265 days
Young. 1 " twins rare " nurse maximum 3 yrs

diet

Wild. eggs, fruit, insects, leaves, small invertebrates, & young shoots
Zoo. Monkey Chow, fruits, & vegetables

habitat/range

lowland " hilly tropical rain forest " Southeast Asia (Borneo & Sumatra)

status

US Endangered " CITES App I " due to habitat destruction " SSP " studbook participant " Great Ape TAG

note

two distinct sub-species - Bornean & Sumatran " sub-species genetically quite different & managed (bred) separately

oregon zoo exhibit

Primates