Molecular evidence indicates that the lineage of gibbons ( family Hylobatidae ) diverged from Great Apes some 18-12 million years ago, and that of orangutans ( subfamily Ponginae ) diverged from the other Great Apes at about 12 million years ; there are no fossils that clearly document the ancestry of gibbons, which may have originated in a so-far-unknown South East Asian hominoid population, but fossil proto-orangutans may be represented by Sivapithecus from India and Griphopithecus from Turkey, dated to around 10 million years ago.

Further discoveries indicated that gorillas and chimpanzees are more closely related to humans than they are to orangutans, leading to their current placement in Homininae as well.

The orangutans are the two exclusively Asian species of extant great apes.

Native to Indonesia and Malaysia, orangutans are currently found in only the rainforests of Borneo and Sumatra.

There are several conservation and rehabilitation organisations dedicated to the survival of orangutans in the wild.

The great apes ( gorillas, orangutans, and chimpanzees ) are dimorphic and practice polygyny.

The human legs are exceptionally long and powerful as a result of their exclusive specialization to support and locomotion — in orangutans the leg length is 111 % of the trunk ; in chimpanzees 128 %, and in humans 171 %.

Chimpanzees are members of the Hominidae family, along with gorillas, humans, and orangutans.

The orangutans are allowed access to the Think Tank ( see below ) by travelling along the " O-Line ", a series of high cables supported by metal towers that enable the orangutans to move between the two building as they please.

The Zoo's orangutans ( which are sometimes used in keeper demonstrations ) are allowed to move from the Great Ape House to the Think Tank whenever they want, and the building includes suitable enclosures for the apes should they choose to stay there.

As noted above, this definition makes the Pongidae paraphyletic, and does not show that orangutans, gorillas, chimpanzees and humans are all more closely related to one another than any of these four groups are to gibbons.

These studies have shown that in their natural environments, the nonhuman hominoids show sharply varying social structure: gibbons are monogamous, territorial pair-bonders, orangutans are solitary, gorillas live in small troops with a single adult male leader, while chimpanzees live in larger troops with bonobos exhibiting promiscuous sexual behaviour.

They are the four genera in the family Hominidae ( Homo – humans, Pan – chimpanzees and bonobos, Gorilla, and Pongo – orangutans ), and the four genera in the family Hylobatidae or gibbons ( Hylobates, Hoolock, Nomascus and Symphalangus ).

There are currently seven orangutans at Durell ; The dominant male is called Dagu.

As the Disney movie is " inspired by " rather than " based on " the Kipling stories, the character King Louie does not appear in Rudyard Kipling's original book, as orangutans are not native to India.

This is in contrast with Old World Anthropoids, including humans, gorillas, chimps, bonobos, siamangs, gibbons and orangutans, which share a dental formula of ) New World monkeys in the family Atelidae are the only primates with tails that are prehensile.

Some species, such as gorillas and orangutans, are well known while other species, such as the Livingstone's Fruit Bat, the Pied Tamarin, the Giant Jumping Rat, the Madagascar Teal ( Bernier's Teal ), the Echo Parakeet ( Mauritius Parakeet ), the Mountain Chicken ( actually a giant frog ), and Round Island Boa, are more obscure.

Home to the nation's largest collections of gorillas and orangutans, the zoo is also one of only four zoos in the U. S. currently housing giant pandas.

Monkey World also works in Asia with the " Pingtung Rescue Center for Endangered Wild Animals " to try to stop the smuggling of gibbons and orangutans from the wild for use as pets.

Its bipedality, fur coloring, and southerly location on the island make orangutans an unlikely explanation, and its bipedality, size, and other physical characteristics make gibbons, the only apes known to inhabit the area, unlikely as well.

Work with Washoe and other signing primates motivated the foundation of the Great Ape Project, which hopes to " include the non-human great apes < nowiki > orangutans, and gorillas </ nowiki > within the community of equals by granting them the basic moral and legal protections that only humans currently enjoy ", in order to place them in the moral category of " persons " rather than private property.

The Seneca Park Zoo is home to two of the three African elephants in New York ( the other is Reba, at the Double M Ranch in Hastings ), and the only orangutans in New York.

Their only documented predators — apart from humans — include snakes, hawk-eagles and orangutans, although cats, civets and sun bears are suspected.

Males have characteristic cheekpads, which only grow with sufficient testosterone levels, and use a deeply resonant voice to make resounding ' long calls ', and tend to spend months alone in the wild without significant interaction with other orangutans.

Prominent sagittal crests are found among male gorillas and orangutans, and do occur but only rarely in male chimpanzees such as Bili Apes.

Classified in the genus Pongo, orangutans were considered to be one species.

Witnesses could possibly be seeing orangutans ; however: 1 ) this species has long been thought to have died out in all but the northern regions of Sumatra and 2 ) witnesses almost never describe the animal as having orange fur.

* Zoological & Botanical Garden: This garden houses 70 species of animals, mainly small animals such as lesser pandas and orangutans.

Blumenbach was one of the first scientists to understand the identities of the different species of primates, which were, excluding humans, orangutans and chimpanzees ( gorillas were not known to Europeans at this time ).

There is an active breeding programme for many of these species, notably the orangutans, gibbons, and lemurs which rarely breed in captivity.

Call and Tomasello's study that looked at understanding of intention in orangutans, chimpanzees and children showed that all three species understood the difference between accidental and intentional acts.

Enhanced chimpanzees, gorillas, orangutans, snakes and two species of sentient elephant now have citizenship.

These orangutans are part of an international program to reintroduce rescued ex-pet and orphaned Sumatran Orangutans into the wild to establish a new population of this critically endangered species.

This species links chimpanzees, gorillas, orangutans, and humans.

Rather than a full common ancestor, it has been suggested that the species may be ancestral to humans, chimpanzees and gorillas but not orangutans, given certain characteristics of the face.

Any one of the species in this genus may have been the ancestor to the modern orangutans.

Prior to her field study of orangutans, scientists knew little about the species.

Although one Canadian author in the late 1990s was critical of the rehabilitation methods, the ongoing birth of new orangutans among the formerly-rehabilitated adult orangutans at Camp Leakey is part of what makes it the longest continual study of a single species.

The included renovations and additions include an Arkansas Farmstead exhibit with native species and information on the importance of agriculture to the state, the continent of Asia, which will be located where the Greats Apes exhibit is at present, with a larger elephant exhibit, orangutans, blackbuck antelope, Sarus cranes, and other Asian species, the continent of Africa with a new giraffe barn, the African Veldt mixed species exhibit, a new cheetah habitat, the African forest area, and the African Outpost, a new entry complex located north of Zoo Drive complete with a new restaurant, carnival style rides, and an ice cream parlor and a New Discovery Center education center with new rooms, exhibits, and education animals.

She is an advocate for animals and has hosted at her North Hollywood home a fundraiser for the benefit of orangutans as an endangered species, under the Orang Utan Republik charitable foundation.

During this time, it began breeding endangered species, including orangutans, kinkajous, siamang gibbons, and kudus.

He investigated the anatomy of eight orangutans, and claimed it was a different species from the human being, and not simply a " degenerate " type of ( white ) human, as some contemporary scientists theorized.