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April 1, 2025April 1, 2025

African elephant populations have stabilized in their Southern African homes

African elephant populations have risen and fallen incredibly fast over the last few centuries. It is estimated that as much as 20 million Savanah elephants roamed Africa in the year 1800, but in 1979 just 600,000 remained, and in 2016 just 415,000 live in Africa. At that point, over 100,000 had been poached in the previous decade.

Unfortunately, it is not merely a case of making more parks. Elephants are incredibly intelligent, but so called fortress reserves, are not good enough. Indeed, less well protected reserves, that are linked together by migration corridors, are far better for the elephant population, than the aforementioned fortress reserves.

These corridors have multiple benefits, from allowing elephants to leave overpopulated areas, to being able to move to places where food and water are available. It also means that the elephants can leave areas of heavy poaching, for instance the Virunga national park, where elephants virtually disappeared in the 1990s, but have started to return from Queen Elizabeth national park in Uganda, across the border.

Where animals cannot move, one often has a boom and bust kind of population dynamic. Now, it should be noted, that this is not always easy, as migration corridors are rarely completely empty of humans, so there is more conflict in these areas, never-the-less, it is clear that these corridors are essential, if these elephant populations are to survive into the long-term. Of course, it also leads to an interesting situation, where virtually all of the huge ecosystems in Africa are along borders, as this allows more than one country to share the cost.

Of perhaps greater worry, this population of 415,000 is both the African savannah and African forest elephant. Yet these two are completely separate species, African forest elephants are nicknamed the gardeners of the forest, and it is questionable whether it can survive as effectively in the long-term without their recovery. The African forest elephant had a population of 26 million in 1800, it is unclear how many are left, but what is clear, is that their population has collapsed in the last few decades.

February 25, 2025February 25, 2025

The odd job of a pangolin carer

Have you heard of a pangolin? Would you recognize one? For many people, the pangolin is unfortunately known, only as a family of species, which have been poached for their scales (made of keratin, and with no medicinal basis) such that of the 8 species, half are endangered and the other half critically endangered. Click on any of the mentions of pangolin on this page to be taken to our pangolin family species page. This poaching is so extreme, that some estimate that this family of species are the most trafficked in the world.

Pangolin are very hard to take care of, which is why there are so few in zoos around the world. Indeed, the vast majority of even wildlife guides in somewhere like the Kruger have never seen a pangolin, even if they are known to exist in the park. A pangolin carers job, is to look after a pangolin, take it into the bush, and find places with many ants and termites, and generally get it ready to return to the wild.

An incredibly rare sighting of a pangolin within the Kruger national park

February 25, 2025February 25, 2025

Restoring a DRC reserve from a ‘triangle of death’ back into a thriving wildlife reserve

Upemba national park had virtually all its large mammals poached, but it is coming back (below is a 3 minute video about this decline).

Just a couple of years ago, 16 members of the Bakata Katanga militia suprised a party of 4 rangers within the park (close to the Upemba base camp). Lying in the south-east of the DRC, this reserve once teamed with life. Tens of thousands of elephants, alongside lins zebra and many other species roamed free.

January 22, 2025January 21, 2025

Electrical and heat battery news roundup

In Finland, a so-called sand battery (it is actually full of crushed soapstone) has been built, which is capable of storing around 100MW of heat. The crushed soapstone is a by protudct of a fireplace production factory nearby. It is true that this heat battery is large, with a height of around 13m and width of 15m, but it can in theory be buried in the ground. It takes 2000 tonnes to fill this heat battery, but this is just 40 waste trucks worth.

It will serve as a thermal battery, with pipes running through it. It can be heated in the Summer when there is cheap or even free power, and then water run through pipes in the material can extract the energy in winter, powering a district heating network – greatly reducing the emissions from heating houses in the whole area (it is estimated that it will reduce emissions by 70%)

The Soapstone leftover, was a wasted product, and before was just thrown away, so this is a far better use. This “sand” battery can hold heats of around 500 degrees for months if required, and is thought to completely eliminate the need for oil in the network heating system. it equates to roughly 1 month of heating requirements in summer, and 1 week in winter. Costing around $200,000, compared to $1,600,000 for the equivalent lithium battery, it is a good deal. While it is true that it would take around 30 of these to keep the town going for a year and it only supports 100 houses and a public swimming pool, but there is huge quantities of similar waste created around the globe, and therefore is capable of doing far more than one would think.

Simulations of the same idea, in Seoul have suggested at up to 39% savings. It is thought, that as the deployment of solar increases, there will be huge amounts of excess power to be pumped into things like this. Some countries have wonderful quantities of excess electricity in the summer, and while we need to ramp up the quantity of solar wild and other zero carbon electricity, this gives us a route to a zero carbon world.

UK scientists created the worlds first diamond battery, capable of giving power for thousands of years. It is made from synthetic diamonds, which contain a radioactive element called carbon 14. The battery makes electricity from this radiation, much in the way that solar panels work. This battery would still be at 50% power after 5000 years. From devices that need powering in your body, to deep in the sea or in space.

At the end of their lives, these batteries can go back to the manufacturers to be recycled. There is much work being done on this, not least looking at other radioactive elements, to increase the power output.

Carbon nanotubes store triple the energy of lithium batteries. New research shows that twisted nanotubes can store high densities of energy – triple that of lithium weight for weight. It is thought that these could power things like medical implants. Of course, this is great, though only adds to the potential long list of things that nanotubes can do if we can learn to reliably create them in the future. In bigger sizes, it is calculated that these carbon nanotubes can store 15,000 times more per unit mass, than steel springs.

These are both areas which I write on, regularly, so check back for more news. I should also note, that these roundup articles should allow a return to focusing on wildlife rather than clean tech soon.

January 21, 2025January 21, 2025

Pine marten roundup

For any readers who do not know what a pine marten is, the above will give you an idea. It is an arboreal predator (that is, it hunts in the trees). There are a total of 8 species of marten across the world. Historically, this was the second most common predator in the UK, with only the fox being more common.

Unfortunately, its habit of taking chickens lead to it being hunted ruthlessly. At the current time, it hangs on in Wales, and has a significant population in Scotland. In Ireland, the recovery is far further along.

In the UK, one of the reasons that we miss this little predator, is its impact on grey squirrels. Unlike the pine marten, the grey squirrel is not native to the UK, and its presence does much damage, from its impact on trees, and other plants, to the fact that it carries a disease which wipes out the reds rapidly (so they are incapable of living alongside each other). This is a species which I have followed closely, and while other matters have stopped me blogging on this species as often as I would like, it has not stopped me from reading about it, so you will find summaries of a variety of stories below.

Reintroduction project in Dartmoor: 15 pine martens were released in secret locations within Dartmoor in September. A total of 7 conservation organisations have been involved in this translocation. It is a total of around 150 years since pine martens were last in the area, but the translocated individuals are settling and slowly dispersing across the landscape.

To the right you will find a tiktok video which will give you details on this reintroduction.

While there is no idea where the pine martens came from, they appear to be doing well, and as the video shows, are breeding. While they have not been there long, so there is little evidence yet, it is highly likely that the pine marten arrival will be bad for local grey squirrel populations (a non-native squirrel which does much damage to UK woodland). This is an area of excitment and should be followed closely.

Pine marten spotted on Longleat estate

Pine marten caught on camera trap in Longleat estate in Wiltshire. It is unclear where this individual came from, lying half way between the forest of dean and the new forest (but far from both), but it is thought it has arrived naturally. While red squirrels would not be able to reappear in this part of the country, without help, as all surrounding areas have grey squirrels, should the pine marten survive, it is likley to greatly impact the local popualtion, and create an island, into which red squirrels could eventually return.

Pine marten in the forest of dean

Pine marten were translocated from Scotland into the forest of dean, beginning in autumn of 2019, when 19 were introduced, and a further 35 joined them in the next 2 years. Last summer, there was an estimate of 60 living in the forest, which while not a big increase, it has not fallen.

While the forest of dean covers just over 200 square miles, it is thought that 60 is roughly the carrying capacity. That suggests that the pine martens in the forest of dean need roughly twice as much space as elsewhere, so time will tell if the population can grow beyond this level. Still, it seems likely that this number of pine martens should be able to eradicate the grey squirrel, or at least greatly reduce its number in the area.

The below video shows 3 cubs from around 4 years ago.

Pine marten in the forest of dean

Research is being done on whether pine martens can live in timber forests – which account for a lot of forest in Scotland

Some simple changes may well allow timber and pine martens to flourish alongside each other. Across 1 woodland, a number of nest boxes have been added, which appears to be helping. The plantations are also looking at letting some older trees stay standing, as these are where cavities appear, which is the pine martens natural home. This research is being carried out in the forest of Ae and around Castle O’er.

Pine martens have turned up in a London cemetery, in area of England where they have not been seen for 150 years

The Zoological Society of London ZSL (London Zoo) already had a project in the area with remote cameras, as it is a stronghold for the hedgehog (unfortunately, another species with a horrific decline in the last 20-30 years). It was just one (and this was in 2022, so may well be gone), but it is exciting that such a small area can house an animal like this.

The Forest of dean, is 80 miles away, which is the nearest population, so it is thought that this might have to be the result of an illegal translocation (they are being translocated, but should be done by professionals, with checks and more.

Pine marten recovery is further along, and helps understand how it will work in England, particularly in cities (not the safe zone once thought)

Once almost extinct, for similar reasons in the UK (habitat destruction, and persecution) in 1976 they were given legal protection, and at the same time, forestry started to expand once again. The pine marten is how living in around 45% of Ireland.

The red squirrel is recovering as a result. There was a fear that grey squirrels would survive within cities, as pine martens are generally to shy to venture into even large parks within cities. However, what has been found, is that the abundance of squirrels in cities is a mirage – there are only sustained by populations outside the city, therefore, should places like the green belt around London get settled by pine martens, it is likely that the London squirrels would disappear within a few years.

Similar to elsewhere, pine martens have now also been introduced to the Lake district.

December 19, 2024December 16, 2024

Wildcat kittens born outside captivity in Cairngorms

Wildcats are native to the UK, but have been pushed to the brink of extinction by hybridisation with native cats – which come from the wildcats from places like Israel in the middle east. As a result of this, as well as trying to remove the feral domestic cats, and their descendants, they are trying to create pockets of Scotland, which would allow these cats to recover.

The natural behaviour of a British wildcat when meeting a feral cat, is to kill it. However, as these animals become rarer, even rare breeding events, can threaten the survival of the whole species. This behaviour also means that with careful planning, we should be able to reintroduce them into other parts of the country. There are a range of other wild predators lost over the last couple of millennia – and I hope to see the others return, but it is thrilling to know that a wildcat is once again living and breeding in its native habitat of the Scottish mountains.

These wildcats are thought to be the first born wild in Scotland for 5 years, after 19 wildcats bred in the Highland wildlife park, were released into the Cairngorms national park.

December 16, 2024December 16, 2024

Tigers have been successfully released into a part of Russia that they were lost from 50 years ago

Two of the released tigers in a part of Russia not been seen for 50 years – photo credit ANO WSC

Tigers once roamed Russia from East to West, but by the mid 19th century, the population had fallen to just 1000. However, the question is what was it like originally? Well, one thing we have found out in the last decade, was the fact that the Caspian tiger never existed, this was instead, merely the most westerly population of the Amur tiger. The scary thing about this, is it suggests that the Amur tiger would have roamed possibly millions of square miles of land – and presumably have existed in huge numbers, perhaps over 100,000, though the decline in these numbers is likely to predate modern humans (our ancient pre homo-erectus ancestors were incredibly efficient at killing mega-fauna, thought to be responsible for much of the worlds extinct mega fauna).

While parts of the western end of the tigers range are now well populated by humans, there are still vast areas ready for the tigers return – such as countries like Kazakhstan. This move is perhaps less of a jump forwards – never-the-less, tigers have not been seen in this new area for 50 years.

The Amur tiger population dropped very low, which means that these 6 initial translocations are well suited to form an initial core for the new population, though to retain genetic diversity, it will be necessary to translocate tigers back and forth for the next few decades, until both tiger populations are more safe.

We are a long way from the Pri-Amur tiger population being viable in the long-term, but this reintroduction is a good first step. I hope to see an acceleration of these reintroductions (it was a decade ago that translocation into Kazakhstan was discussed, and this has not yet happened). Is this just the first step in allowing the Amur tiger to return to former haunts, or will this be the only step? Time will tell, but at its worst, this should double the habitat, and potentially the population of the Amur Tiger, and is therefore healthy.

December 4, 2024December 2, 2024

Great white sharks separated into 3 district populations 200,000 years ago – and have Orca stopped hunting the South African population?

These 3 groups do not intermix, and only very seldom, interbreed. These populations are found in the Southern Pacific, Northern Pacific and the North Atlantic and Mediterranean.

This naturally means that the great white sharp is far more at risk of extinction, than if all the great white sharks in the worlds oceans could interbreed.

These areas appear to be bounded by great ocean currents, which are rarely crossed. This is a problem, as if an individual population is lost, it makes it far more likely that distinct genetic information could be lost with it – take the Mediterranean great while shark population, which has seen a dramatic population decline from historic numbers, estimated at between 52% and 96% (areas like the Maramara sea, are known to have lost 96% of their population) depending on which study you read.

This makes local conservation far more essential, and we need to be careful to not loose any individual populations. There has been a great deal of worry for the great white shark population around South Africa, as they pretty much vanished in 2017, but appear to have returned in 2024. The disappearance of the great white was attributed to 2 orca which had become expert in hunting and killing these sharks – it should be remembered, that while great whites are often at the top of the food chain, they are hunted for food by orca. Whether these orca have gone back to eating something else, hence the great white shark return, is a question that does not appear to have been answered as yet.

December 2, 2024December 2, 2024

As water buffalo return, they are revitalizing the kizilirmak delta – formerlly destroyed by becoming industrial wastelands

There are many species around the world which are so important to their habitat, that even a reduction in the population can cause problems – this is one of them. After tadpoles have lost their tails, many will climb onto the hairy back of the water buffalo, getting a ride to other rich feeding areas (and the buffalo gets any irritating flies eaten). There can be as many as 20 frogs on each water buffalo.

Water buffalo were first domesticated 3000 years ago, in Asia, but have proved to be so useful, there are now 200 million spread across 77 countries, on 5 continents. Initially considered as useful animals for plough and similar farm work, in recent times, it has been recognized for its ecosystem engineer duties.

Thriving in wetlands, they can force their way through places that other herbivores fail. While they are not native to many of their current homes, they are capable of filling ecological niches that have long been empty after the initial large cattle like animals were killed off, or all taken into captivity. It should be noted, that in some places, like Australia, there are few to no predators, to control such a large animal, which has lead to a population of 200,000. There is a native water buffalo (Anatolian).

A variety of characteristics help this species to easily fill the ecological niche of the European water buffalo (lost around 10,000 years ago). From transporting seeds in their fur, they fill in many of the roles that the extinct European water buffalo did in the long past. Even in places like the UK, which is one of the most nature depleted countries, the water buffalo are replacing long extinct species, and recovering ecosystems as a result.

This sort of behaviour has to be carefully managed, as in many places, introducing a closely related species can be very costly. In the UK, the grey squirrel has decimated the population of the native red squirrel, and this is not an isolated example, with many others from around the world. However, so long as their effect is closely managed, and there is not a closer relation to the missing species, the impact is likely to be a net positive. Over the last 50 years, 1/3 of the worlds wetlands have been lost, these species, when carefully managed, are likely to be able to bring some of this back.

November 23, 2024November 21, 2024

How did the wolf disappear from Holland and why is it back

The wolf disappeared from Holland around 1870, though their decline was rapid – in 1760 (just over 100 years before) people in Brabant talked of a wolf plague). In 2015, the wolf was first sighted in Holland, and while some people had said that Holland was to densly populated to allow the wolf to return, this seemed to be wrong. Wolves have returned to many of the countries around Holland, and so it seems quite odd to think that it wasn’t considered that they would cross into Holland.

In 2022, there were thought to be 4 packs of wolves (including 16 pups) as well as an individual wolf. This number has, however, grown fast in the time since, and the current number is thought to be 9 packs. What is even more exciting, it is predicted that the country can support between 23 and 56 wolf packs at a minimum – which as a wolf pack contains 6-7 wolves on average, means a total population of between 138 and 392. It should be noted, that this number is not likely to remain genetically healthy into the long-term, however Germany has a wolf population of over 1000, and while these are mostly based in the East of the country, wolves disperse great distances, so it is likely that genetic material will arrive naturally, relatively regularly. There is also a founding (if small) population of wolves in Belgium, thought to number between 15 and 24 (it is also predicted to grow by 30% a year.

There is a problem, the Hoge-Velue is one of Hollands biggest reserves, but it is owned privately. They have decided that wolves are not welcome, and are making efforts to kill those that get through their fence. This is because, without the wolf, deer are easily seen within the reserve, and they believe that the number of tourists will dry up, if it becomes hard to see the red deer, as well as the roe deer and boar.

I find this attitude rather baffling and perverse. Furthermore, when we were there last year, we spent time in the government owned reserve, which borders the Hoge-Velue, this is government owned, and wolves have settled here. I spent a number of nights within the reserve in a hide. I did not get to see a wolf (though I met a local who had a wide range of fantastic shots he had taken over the previous years), but while watching and waiting in the hide, I saw red and roe deer, as well as wild boar, in significant numbers. The idea that someone would believe that the amount of tourism visiting after wolves return would decrease, seems quite contrary to what usually happens elsewhere.

Wolves are a part of Hollands animal food web, and while it is likely to take some time to get used to living with them present once again, it is going to allow the whole ecosystem to thrive. I feel frustrated, that in the UK, we do not have a similar situation, where wolves can simply wander across an unmarked border. I do believe that in the end, wolves will return to the UK (our food web is horrifically out of balance because of a lack of predators), however, on the last occasion that it was debated, numbers from a very specific country were used to block any further discussion (Click here to read a previous article on this subject, or visit the wolf page here to get a complete list of all occasions that they have been mentioned on this site)

Pine marten spotted on Longleat estate

Pine marten in the forest of dean

Pine marten in the forest of dean

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