EDGE of Existence. This practice is closely tied to what is called swidden agriculture: as locals burn fires to clear forested areas, orangutans within those areas flee from the conflagration and are captured for meat or sale. When water is difficult to reach, orangutans chew leaves to make a pulpy sponge to soak up the water. The oldest of the Zoo’s orangutans, Lucy often delights visitors by sitting up at the glass. Sumatran orangutans are among the most critically endangered primates in the world, with issues including human encroachment and habitat destruction. Certain vocalizations such as nest smacks and throat scrapes are considered cultural and are found in some populations of wild orangutans but not in others. Females do not live in tight social groups, but they are familiar with and have relationships with other females in the area. They are distinguished from Bornean orangutans due to their fur being a lighter shade of orange and the Bornean orangutan … After adopting this position, the AZA then joined the Round Table on Sustainable Palm Oil (RSPO) in order to represent the views of its member institutions with key stakeholder in the palm oil industry and to advocate for environmentally sustainable production. [online] Available at:
[Accessed 28 May 2020]. There is not enough available data on the life expectancy of female Bornean orangutans. Orangutans' social structure is connected to the distribution of food resources, primarily fruit. Habitat destruction and the subsequent degradation, either from commercial timber harvesting or conversion of land to agriculture (particularly palm oil), poses a very serious threat to these arboreal apes. Always choose certified palm oil products that support sustainable production and prevent deforestation. In September 2014, the board of the AZA adopted an official position on palm oil. Weighing in at 230 pounds, he is easily recognizable by his large cheekpads and long hair. To get termites they will strip leaves off a branch and reach this in to the termite mound to extract termites to eat. Orangutans have long, sparse orange or reddish hair unequally distributed over their bodies. By year 3 they are starting to make small trips away from mum but still within her watch. From birth, orangutan infants cling to their mothers as they maneuver through the trees. Orangutans usually have a single baby, and twins are rare. All three orangutan species — Bornean, Sumatran and the newly discovered Tapanuli — are critically endangered, primarily due to habitat loss. A Male Sumatran orangutan is often twice as big as the female. This long call resonates in the male's enlarged throat sac and echoes through the forest. The orangutans are highly social but semi-solitary in the wild, so they live in small, flexible social groups at the Zoo. Orangutans also come down if there is a need to find food and water elsewhere, for example, if there is a drought or fire. Orangutan.org.au. Sexual maturity for males and females in zoos is around six years, although it can take up to 10 years or more for a wild female to mature and longer than that for males. There is not enough available data on the life expectancy of female Bornean orangutans. However, weaning is highly variable, depending on the mother. Forage items placed in hay for the orangutans include air-popped popcorn, diced fruits and veggies, beans and sunflower seeds. The total population of wild Bornean orangutans is estimated to be approximately 70,000-100,000 individuals. Males and females are different in appearance due to the presence of large pouches on the females cheeks known as flanges. Sumatran orangutan’s are omnivores. Both species have drastically declined in population in recent years. ... Lifespan: Orangutans live up to 59 years in zoos. Orangutans are the largest arboreal (tree-climbing) animal on Earth. Native to northern Indonesia, orangutans spend most of their time high in the trees; they are the most arboreal of the great apes. It is also used to alert females to his present for mating. MRC 5516 The two males, Kiko and Kyle, are not housed together, but the females have the flexibility to choose which group to join. The risk of extinction for the critically endangered Bornean orangutan is very high. These continue to be difficult times, so we must fall back on your passion for our critical mission now more than ever. 2020. Pongo abelii (errata version published in 2018). They are weaned at 5 to 6 years old. London: DK, Perthzoo.wa.gov.au. Females are about 43 inches tall (110 cm) and weigh between 90 and 110 lbs (40 to 50 kg). Habits and Lifestyle. Individuals within a certain range appear to know others and interact comfortably when they encounter each other. 2020. When on the ground, they use all four limbs, supporting themselves on the sides of clenched fists, or occasionally walk on upright on two legs. It can be difficult to tell Sumatran and Bornean orangutans apart. After reaching adolescence at four or five years, these animals become increasingly independent of their mothers. Sumatran Orangutan | EDGE Of Existence. They have been seen to use tools. In many zoos they are known escape artists and have been known to break out of their enclosures in highly creative ways. In the evening, they are given bananas, apples, primate chow, greens and a selection of other fruits and vegetables. This allows them to distribute their weight among the branches.
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