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There is a serious problem in Borneo, that appears to be largely flying under the radar.
A survey of villages found that 30% of villages had evidence of orangutan killiing in the last 5-10 years. This is despite a taboo on killing the species.
The number of Borneo Orangutans is falling, and it is thought that the wild population will have fallen below 100,000 in recent years.
Thought to have gone extinct 295,000 and 215,000 years ago, having first appeared around 2 million years ago. Rather than being caused by our ancestors, it unfortunately became extinct as a result of the climate became more seasonal and the plant-eating primate struggled to adapt to changing vegetation.
Might this be a for-shadow for the extinction of the rest of the great apes?
The largest ever primate Gigantopithecus blacki went extinct at a time when Asian great apes were thriving, and its demise has long been a considered a mystery. A massive regional study of 22 caves in southern China explores a species on the brink of extinction between 295,000 and 215,000 years ago. As the environment became more seasonal, forest plant communities changed Primates such as orangutans adapted their eating habits and behaviors in response but G. blacki showed signs of stress, struggled to adapt and their numbers dwindled.
This species was 3m (10 feet) tall, it was around twice the weight of the the largest gorillas. It was first identified around 100 years ago, from fossilized teeth (around 2000 have been found) sold as dragon bones. Around (700,000 or) 600,000 years ago we start to see large environmental changes and during that period we see a decline in the availability of fruit.
As a result Giganto (ate) less nutritious fall-back foods. We’ve got evidence from looking at the teeth structure, Westaway added. Pits and scratches on the teeth suggest it was eating really fibrous food such as bark and twigs from the forest floor.
Funnily enough, they are not thought to have ever lived in caves, but instead had their remains carried there.
As there are no, non-cranial fossils (i.e. any fossils of any part of this species below the neck) , it’s hard to know exactly what Gigantopithecus would have looked like. Its upper molars are 57.8% larger than a gorilla’s and the lower molars are 33% larger, suggesting its body weight would have been 200 to 300 kilograms.
Given its size, it is thought to have long abandoned the tree-tops, though given its closest living relative is the Bornean Orangutan, of which, older males are often spending more time on the ground given their large weight as well.
There are fossils of homo erectus from nearby, from around 800,000 years ago, suggesting that we might well have lived alongside them. How happy or harmonious this relationship is, we cannot know. Unfortunately, given recent history, it is quite likely that directly or indirectly we had a hand in this species extinction, given our impact on almost all other species that we know.
I wrote in February about how an assessment had found that 20% of palm oil plantations were illegal (to read click here). This latest assessment suggests that in its heartland, half are illegal. Riau province is this heartland. Illegal plantations within this area cover an area almost as large as Hawai, and hosts more than half of the illegal plantations in the whole of Indonesia.
These illegal plantations are also not all owned by small players, with some of the biggest names in palm oil on the list. The government is suggesting 3 years to get retrospective permission.
The problem with this, is that it is essentially permission by the back door. If companies know that they will eventually get permission, there is a high incentive to break the law.
Furthermore, if these areas were designated for coservation, we need to find areas of similar importance to replace them
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The primates are in some ways one of the most successful families. It is true that many are now endangered, however, unfortunately, that is as a result of the run-away success of the most successful member of the primate family us! Having left the rainforests behind, we have been reducing their coverage dramatically over the last few centuries.Â
The sad thing, is that while we have pushed many of our closest cousins towards extinction, the loss of forests may well cost us dearly in the future as well. As a species, we need to pull together to meet this challenge. in order to jump to the various families, click on the family of interest above – though all can also be reached by scrolling down.
Great ape Family split is thought to have split from its nearest relative – the gibbon family, around 17 million years ago.
4 million years later the Orangutan family split from the gorilla line and the human/chimp line.
3 million years after this (so around 10 million years ago) the gorilla family split from the Homo (humans) and Pan
Finally the human line (homo) split from the Pan line 5-6 million years ago.
It should be noted, that chimpanzees and Bonobos split from a common ancestor just 1.8 million years ago. This occurred as the two populations ceased to be able to have contact with each other – the Congo rive formed between 1.5 and 2 million years ago.
For more information on each species, click on their photo and this will take you to their page
It should be noted that while I have grouped eastern western and skywalker gibbon together, there is some contention that the skywalker gibbon should be in its own genus, having diverged around half a million years aog
This family is the Genus: Nomascus or crested gibbon.
The last Genus of gibbons is Hylobates: dwarf gibbons.
Orangutans are often animals high on the list that people wish to see one day. Orangutans are the only great ape that lives outside Africa. While fossils show that at one time, it was found on the mainland of Asia, the Orangutan is now restricted to the islands of Borneo and Sumatra.There are 3 species of Orangutan and their conservation status varies dramatically. The Orangutan was first scientifically described in 1779 by Dutch anatomist Petrus Camper.Â
You will find all the articles we have written on Orangutans below
As always, we hope to add many destinations for Orangutans in the near future, do get in touch if you wish to list somewhere in their range. These links will be added below the news sections as we make links.
 Orangutans are often animals high on the list that people wish to see one day. Orangutans are the only great ape that lives outside Africa.
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While fossils show that at one time, it was found on the mainland of Asia, the Orangutan is now restricted to the islands of Borneo and Sumatra. The Orangutan was first scientifically described in 1779 by Dutch anatomist Petrus Camper. This page is devoted to the Orangutans of Sumatra.
As with all great apes, the Orangutan is a keystone species and by saving its habitat, we save many thousands more as a by-product. The greatest threat has been palm oil plantations – while in theory these are created to reduce carbon emissions, it is questionable as to whether these plantations could ever be carbon negative. Building it on land that has to be cleared of rainforest, means that these palm oil plantations will have huge carbon footprints, which are likely to take over a century to pay off. As such it is not useful for climate change mitigation.
The orangutans of Sumatra are classed as critically endangered.Â
They are currently thought to number around 14,000. As always, we hope to add many destinations for Orangutans in the near future, do get in touch if you wish to list somewhere in their range. Below, any listings that might get added in the future, you will find all the articles we have written on Orangutans.Â
The Borneo and Sumatran Orangutans were only recognized as separate species in 1996
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In most countries, if a dam was to cause so much destruction to the last habitat of a species, the dam would likely not get permission to be built.
It is true that the dam will only take about 20% of the land in question, directly. It will also split the population in half.
Given that only around 800 Tapanuli Orangutans survive in the wild, the loss of just a handful is bad. A loss of 20% of the remaining population could quite rapidly push the population towards extinction, particularly as it will split the few remaining Orangutans into separate populations which cannot interbreed.
Norway has a huge sovereign fund, into which it pours the countries earnings from fossil fuel extraction. Perhaps recognizing that this has a shelf life which is not far from ending, Norway has made sure that for the most part its sovereign fund is good for the natural world (alongside giving good returns)
Generally rules on financing should have ruled this project out in the past, so it is good that this decision has been eventually made.
Will the dam still get built? We will have to wait and see.
One of the problems with cutting down rainforest, it often what is left is so fragmented that it is useless for conservation. Remaining blocks of forest must allow a viable population of the rarest creatures, in order for the animals not to need to travel outside protected areas.
In Borneo, like in Sumatra, there has been a rapid loss of rainforest over the last few decades. Often it is claimed that enough is left behind in order to conserve the animals that live there.
In Borneo, while there is still a large quantity of wilderness, this is increasingly fragmented.
Continue reading “Positive news from Borneo – reconnecting wilderness”Generally great apes are animals that live in community. Indeed, one of the reasons that great apes developed such large brains is as a result of their need in social situations. Great apes (along with lesser monkeys, dolphins, bears and wolves, with a few more) require a large brain to remember things about the many individuals that they socialize with, and how each has behaved, who is nice.
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Orangutans are often animals high on the list that people wish to see one day. Orangutans are the only great ape that live outside Africa. While fossils show that at one time it was found on the mainland of Asia, the Orangutan is now restricted to the islands of Borneo and Sumbatra.
This page is devoted to the Orangutan on the island of Borneo. The Borneon Orangutan currently numbers roughly 104,750 wild members, which is far more than the other subspecies. It is classed as endangered – 50% of its rainforest has been cut down.
As always, we hope to add many destinations for Orangutans in the near future, do get in touch if you wish to list somewhere in their range. Below, any listings that might get added in the future, you will find all the articles we have written on Orangutans