Amazing Nature

[PeteC]

I think it's just a form of exercise to keep their phins from getting dol....

[pharvey]

"The images were captured by expert photographer Dhritiman Mukherjee. His shots, snapped in India's National Chambal Sanctuary, are highly commended in this year's Wildlife Photographer of the Year (WPY) competition.

Every one of these youngsters needs to survive into adulthood and to breed.

The freshwater gharial (Gavialis gangeticus) is critically endangered. Where once it could have numbered more than 20,000 animals across South Asia, the species is now down to perhaps less than 1,000 mature individuals - and three-quarters of these are concentrated in the Uttar Pradesh sanctuary."
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https://www.bbc.co.uk/news/science-environment-53972571

[lindosfan1]

Comedy Wildlife Photography Awards 2020 finalists revealed.

https://www.bbc.co.uk/news/in-pictures-54118899

Brilliant opportunist photography.

[pharvey]

Comedy Wildlife Photography Awards 2020 finalists revealed.

https://www.bbc.co.uk/news/in-pictures-54118899

Brilliant opportunist photography.

Some crackers there - thanks for sharing

[pharvey]

Quite incredible: -

Bar-tailed godwit flies more than 12,000km from Alaska to New Zealand in 11 days.

"A bird said to have the aerodynamic build of a “jet fighter” has been tracked flying more than 12,000km (7,500 miles) from Alaska to New Zealand, setting a new world record for avian non-stop flight.

The bar-tailed godwit set off from south-west Alaska on 16 September and arrived in a bay near Auckland 11 days later, having flown at speeds of up to 55mph.

The male bird, known as 4BBRW in reference to the blue, blue, red and white rings fitted on its legs, also had a 5gm satellite tag harnessed on its lower back to allow scientists to track its progress. It was one of four to leave together from the Alaskan mudflats where they had been feeding on clams and worms for two months.

The male bar-tailed godwit, whose standard weight is between 190gm and 400gm, can double in size before a long flight but is able to shrink its internal organs to lighten the load.

After leaving Alaska, the birds headed south over the Aleutian Islands and on to the Pacific Ocean. The journey is thought to have been prolonged by strong easterly winds, which pushed the group towards Australia.

The satellite recorded a point-to-point flight of 12,854km but the scientists believe that once rounding errors are taken into account the journey will have been around 12,200km. The previous longest recorded non-stop flight by a bird, of 11,680km, was recorded in 2007.

Dr Jesse Conklin, from the Global Flyway Network, a consortium of Dutch, German and US scientists studying epic migratory journeys, said: “They seem to have some capability of knowing where they are on the globe. We can’t really explain it but they seem to have an onboard map."
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Full Article @ https://www.theguardian.com/environment ... ird-flight

[dtaai-maai]

With all those rings on its legs as well as a satellite tag on its back, it's surprising the poor little sod could take off, never mind fly all that way so quickly...

[pharvey]

With all those rings on its legs as well as a satellite tag on its back, it's surprising the poor little sod could take off, never mind fly all that way so quickly...

It's that trick with the internal organs...... not to mention it's downhill all the way!

[dtaai-maai]

not to mention it's downhill all the way!

Duh... only once they get past the equator.

[lindosfan1]

That is an amazing feat, the bird averaged 27 mph for 11 days unbelievable.

[PeteC]

You need to look at your swallows that you see arriving in the UK every Spring. They weigh about 5 oz and fly up from South Africa, breed, nest and fly back again in the Autumn with their kids. They go over the Sahara as well, about 8,500 miles one way if they go up to Aberdeen. That's 17,000 miles per year for a bird so small, and simply amazing. Not sure how many trips they have in them over a lifetime, but I've read the mortality due to unfavourable winds, sand storms, and other is about 1 million per year for all UK/EU destinations.

[hhfarang]

Tiny little hummingbirds migrate from Canada/US to Mexico/Central America and back each year. Imaging how many little beats those buzzing wings do on a trip like that!

[PeteC]

Scientists find secret of 'uncrushable' beetle's strength

https://www.bangkokpost.com/world/20065 ... s-strength

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PARIS: Looking like it was forged in apocalyptic fires, the diabolical ironclad beetle has a formidable reputation for being able to withstand being stabbed or run over by a car.

Now scientists have found a jigsaw-like mechanism in their exoskeletons that helps the little creature tolerate forces up to 39,000 times its own body weight.

Their discovery could have implications for engineering and robotics, experts say, and even challenge the position of cockroaches as models of insect indestructibility.

The beetle, which no longer has its ancestors' ability to fly away from predators, has developed crush-resistant exoskeletal forewings -- called elytra -- as a form of protection, according to the new study published in the journal Nature.

The beetle, which is roughly two centimetres (just under an inch) long, is an oak-dwelling fungivore primarily residing on the western coast of North America.

In spite of its ferocious name, it tends to scuttle into a hiding place or play dead when attacked, helped by its rough textured, craggy black body that gives it the appearance of a small rock.

"Beyond feigning death, this beetle has a remarkable ability to withstand crushing and piercing strikes from predators, and even the occasional automobile," the study said.

It said they are so tough that entomologists often bend the steel pins they use when they try to mount the beetles in display cases.

Scientists from the United States and Japan looked at the structure of the beetle's elytra, which allow it to withstand forces of up to 149 newtons -- approximately 39,000 times its body weight.

They found was significantly more than other similar beetles could tolerate.

- 'Compressible robots' -

Using advanced imaging techniques, the researchers saw that the beetle has a series of interlocked jigsaw-shaped joints in its elytra and found that the shape of these blades and their laminated microstructure acted to toughen the exoskeleton.

They concluded that the strong yet flexible structure allows the beetles to hide under rocks or contort themselves into tight spaces in tree bark for shelter, bearing extra weight without damaging their internal organs.

The researchers then used 3D printing and simulations to investigate whether this geometric structure could be used as a mechanical fastener for joining different materials -- such as plastics and metal -- similar to that required in turbines in the aerospace industry.

The study found that these diabolical ironclad beetle-inspired designs provided enhanced strength and significantly increased toughness compared to a commonly used engineering joint.

Po-Yu Chen, in the Department of Materials Science and Engineering at Taiwan's National Tsing Hua University, said the weight the insect was able to withstand was roughly 10 times higher than the biting forces generated by potential predators.

"Cockroaches have a similar shape-changing ability, which has inspired the design of a compressible robot that can squeeze into, and move within, tight spaces. Such robots could be used to search for survivors in collapsed buildings after disasters," he said in a commentary in Nature.

Po-Yu Chen, who was not connected to the research, said more research was needed into the structure's potential engineering uses, but said the diabolical ironclad beetle "might now inspire new designs for compressible robots, or for armoured vehicles".

"And the authors' work demonstrates that you should never underestimate the capabilities of insects," he added.

[PeteC]

Damn ugly thing.

[PeteC]

Homeless hermit crabs in Koh Lanta need seashell donations

Help house a hermit crab.

https://thethaiger.com/news/krabi/homel ... -donations

Hermit crabs on Moo Koh Lanta Marine National Park have been seen making homes out of broken glass bottles and other pieces of trash. With the shortage of shells on the Krabi beaches, park officials have launched a project called “Returning Homes to Hermit Crabs.”

The park made a post on Facebook with photo a hermit crab that appears to be living in a broken glass bottle. So far, a number of people responded and pledged to donate around 200 kilograms of shells. A park official, who spoke to the Bangkok Post, says they still need more.

“We still need more… All donated items will be dropped on beaches for hermit crabs to choose their new homes.”

The number of hermit crabs is rapidly growing, but the island doesn’t have enough shells for the crabs and many have resorted to trash left on the beach. The park official says they don’t believe tourists contributed to the shortage of seashells.

“Some tourists might take shells home but that was not the underlying cause of the problem… There are simply more hermit crabs than shells.”

To donate or to get more information, contact the park at 075-656-576.

[PeteC]

How the Soviet Union's end sparked a grand rewilding

Some photos at link.

https://www.bbc.com/future/article/2021 ... -rewilding

After thousands of people left the steppes of Kazakhstan, nature began to reclaim it on a huge scale. When Alyona Koshkina walks through the wild grasses of Kazakhstan’s vast plains in spring, she is overwhelmed by the life blooming around her. Migratory birds zip overhead through a sprawling sky, greenery shimmers, ocean-like in the breeze, and flowers dot the landscape with specks of purple, yellow, white and red.

“You have always this sound of wind in your ears,” she says. “It’s very open.” Koshkina, a researcher at the Association for the Conservation of Biodiversity of Kazakhstan (ACBK), knows this treeless habitat – called steppe – intimately.

“You can see somebody approaching you from a very long distance, an animal or people or a car… and you feel very safe and relaxed,” she adds.

The sheer size of the Kazakh steppe is difficult to comprehend. The wide, relatively flat plains stretch across an area roughly as big as Germany, Poland, the Czech Republic and Austria combined. Kazakhstan is, after all, the eighth-largest country in the world.

But these seemingly boundless wildlife havens were not always devoid of human activity. Since the Soviet Union collapsed in 1991, hundreds of thousands of people have vacated the grasslands. Unprofitable farms once relied on money from the Soviet regime to survive. When the funds dried up, many people were forced to look elsewhere for work.

The Kazakh steppe is not an untouched wilderness but, rather, an abandoned one – a place that is halfway to being “rewilded”. And by land area, it's possibly one of the largest spaces on Earth returned to nature in recent years.

The extent to which the Kazakh steppe has changed in the 30 years since the end of the Soviet Union is difficult to understand because so few people have studied it. Its scale also makes research difficult. But in recent years, Koshkina and others have turned to photos taken by satellites to try and grasp how these majestic grasslands – and the wildlife they hold – have transformed. The picture that has emerged is one of a unique landscape, rich with nature, sporadically scarred by fire, and only occasionally interrupted by a few abandoned settlements.

The Kazakh Soviet Socialist Republic, as it was then known, had been a member of the Soviet Union since 1936. One major change of that era was that collectivised farms overtook nomadic shepherding in the steppes – but they were not as successful as the Soviets had hoped.

Over time, as in many Soviet states, dissatisfaction with authorities grew, reaching a peak during the 1980s, with political turmoil and rioting. In the end, Kazakhstan became the last republic to secede from the Soviet Union, on 16 December 1991. It was soon recognised as an independent state. The removal of Soviet economic infrastructure had a huge impact. By 1995, GDP in Kazakhstan had fallen by 36%. Unemployment rose and the proportion of people living below the poverty line grew from 25% in 1992 to 43.4% in 1999.

Koshkina remembers the 1990s as a difficult time, with electricity shortages and some families left struggling for food and other basic supplies. Her own partner grew up in a village on the steppe, near to a nature reserve, but moved elsewhere like so many others, for economic reasons.

“Still he feels very much attached to this area,” says Koshkina. “We go there almost every weekend and he feels sad for leaving the village.”

Since then, many farms have morphed back into grassy patches, dozens of ruined buildings lie crumbling, and equipment such as water pumps – formerly used by farmers to source water for their livestock – stand unused.

Until recently, it was difficult for researchers to see the full extent of this change, and its effect on nature. Johannes Kamp, a conservation scientist at the University of Göttingen, has been studying the wildlife of Kazakhstan for 15 years – but he remembers when he started in the early 2000s having to piece together his understanding from fieldwork.

That changed with access to satellite imagery – via programmes such as Landsat and public websites including Google Earth and Bing, which allowed Kamp and other ecologists to see how the region evolved across a much larger scale over time. As he clicked through image after image of the landscape, the reality of life on the Kazakh steppe began to emerge.

Images of the steppe snapped from orbit revealed that thousands of human settlements had collapsed into disrepair. Kamp and his team have scoured pictures of more than 2,000 villages or towns and 1,300 livestock stations, the vast majority of which have were fully or partly abandoned after 1991.

As for nature, some things remain unchanged. Across the steppe, Koshkina, Kamp and colleagues used Google Earth and Bing satellite images to map the locations of more than 7,000 Bobak marmot burrows. The marmots are a type of ground squirrel, not unlike groundhogs. The imagery revealed that the area inhabited by the creatures – all six million of them – has remained the same since the 1950s.

For other species, it's a different story. “Some animals got rarer, some got more abundant, some disappeared completely,” says Kamp. “I was witnessing, over these 15 years, how these land use changes affected the whole species community.”

In another study that Kamp worked on with Martin Freitag at the University of Munster and colleagues, satellites revealed that much larger swathes of Kazakhstan are succumbing to wildfires than they were previously. In one area, roughly the size of Germany, the team found many more pockets of severely burned habitat in images from 2015 than were visible in pictures from 1990.

“Kazakhstan is now a global fire hotspot,” says Kamp. “We see at least a tenfold increase in the area of grassland that is burning now.”

Why has this happened? Since the fall of the Soviet Union, fewer and fewer farmers have been bringing their livestock out onto the wilderness of the steppe to graze. Livestock in the region has plummeted, say the researchers. Data from the United Nations’ Food and Agriculture Organization reveals that the number of sheep on the Kazakh steppe fell from 33 million in 1992 to 8.7 million in 1999. Cattle numbers dropped from 9.5 million to 4 million.

Long grasses that grow unimpeded thrive in the spring but turn dry thanks to the Sun and brisk wind of the steppe in summer, which makes it easier for fire to spread.

Freitag explains that, in order for the steppe ecosystem to remain in balance, it requires a significant amount of grazing so that fires do not take over every year. To get a closer look at how wildlife in these grasslands was faring, the team used the satellite images to help them decide where to carry out research in the field – and that, they say, is where the true magic of the steppe becomes apparent.

On those expeditions, Freitag recalls how a symphony of skylarks would wake him up at 04:00 or so every morning. The thin material of his tent did little, if anything, to dampen the birds’ joyous calls. In 2016, he and his colleagues were in the field in the middle of the Kazakh steppe, travelling off-road while conducting biological surveys and collecting soil samples. Day after day, they would stalk the grasslands, noticing a stunning variety of plant and animal life.

Koshkina mentions how her mother, also from Kazakhstan, complains that the steppe seems barren – she expects forests and mountains. When you drive through the steppe, it appears to be nothing but monotonous expanses of endless grass. But that grass is full of surprises. Freitag mentions the wild tulips, for instance.

“When the snow has melted and it becomes a bit warmer at the end of April, the massive flowering of tulips is really most colourful,” he says.

And there are many birds, besides the skylarks, such as sociable lapwings, a critically endangered species that breeds almost exclusively in Kazakhstan, and pallid harriers – majestic birds of prey that migrate elsewhere for the winter. They’ve even been known to travel as far as Great Britain.

Then there are the wild grazers. One of the most iconic animals of the Eurasian steppe is the saiga antelope, a small antelope with a characteristically long nose. Its flappy, broad nostrils hang down at the front of its face. The saiga almost looks like a creature from another world.

In the post-Soviet era, poaching led to a huge decline in saiga numbers in Kazakhstan – in fact they neared extinction. And in 2015, a BBC camera crew observed hundreds of thousands of saiga die on the steppe after a bacterial infection spread through their population.

But EJ Milner-Gulland, who has studied these antelope for years, says there has been better news of late. Saiga numbers more than doubled in the two years to 2019 and now total more than 330,000 (though there hasn’t been a population count in 2020 due to Covid-19).

“It’s a major success story,” says Milner-Gulland. The saiga population could grow yet further, which would increase grazing on the steppe and balance the ecosystem in other ways, too. More dung means more food for insects, and when the antelope die their carcasses are scavenged by birds and other animals.

Milner-Gulland would love to see a million saiga in Kazakhstan once again – the sort of number that roamed the steppe pre-1991. But she would settle for half that.

Protecting the saiga from poaching and ensuring that their routes are not blocked by fencing or infrastructure, could increase their numbers. There are also projects to reintroduce other wild grazers such as the kulan, a type of wild ass.

But a rewilded steppe is not necessarily one without any human influence. In some places farmers are returning, swallowing up wild grasslands as they do.

Centuries ago, the grasslands were home to nomadic farmers, who moved their livestock from place to place for grazing. They shared the steppe with saiga, kulan and wild horses. But most farmers in the region now keep their livestock in one place, says Koshkina.

“It’s not moving any more from one place to another, it’s just grazing around the villages or a farm in very short distances,” she explains. “That is not what is needed for these steppes.”

A rewilded steppe is not necessarily one without any human influence

Ironically, the abandonment of the steppe has exposed the fact that specific forms of human activity could benefit wildlife. But whether Kazakhstan will bolster populations of grazing animals, facilitate the return of nomadic shepherds, and establish more protected areas remains to be seen.

The country’s population, having declined by nearly 1.5 million post-1991, is now growing again. So too is its economic output. Kazakhstan is poised to experience huge changes in the years to come and some of those may threaten the fragile wilderness of the steppe. Exploitation of large oil reserves in the grasslands, for example, could lead to increasing industrialisation. And Koshkina worries about how much land will eventually be converted once more into farms – “dead fields”, she says, laced with pesticide.

“There is a window of opportunity to restore this ecosystem that has been left by people,” she adds. “As I see it, this window is closing soon.”