The 90-year-old Australian fish who likes belly rubs is likely oldest aquarium fish – video

A primitive Australian fish living in a San Francisco museum is believed to be the oldest living aquarium fish in the world. Methuselah is a four-foot-long (1.2-meter) Australian lungfish, weighing around 40lb (18.1kg). The species has both lungs and gills and is believed to be the evolutionary link between fish and amphibians. The lungfish was brought to the San Francisco museum in 1938 from Australia and now lives at the California Academy of Sciences. The species is threatened and can no longer be exported from Australian waters so biologists at the academy say it's unlikely they'll get a replacement once Methuselah passes away

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Rhino that lost horns in attack back in South African wild after 30 operations

Six years ago poachers hacked off Sehawukele’s horns; now he’s back in a game reserve

A 10-year-old white rhino whose horns were brutally hacked off has returned to the wild after 30 operations over six years to repair the gash in his face.

His rescuers named the bull Sehawukele, meaning “God have mercy on us”. Called Seha for short, he was found by police stumbling near a fence in a reserve, so disfigured that he could barely hear or eat.

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Stranded dog saved from rising tide after rescuers attach sausage to drone

Team in Hampshire ties sausage to drone as ‘last resort’ to rescue Millie the jack russell from mudflats

As the tide rose, it began to look perilous for Millie the jack russell-whippet cross, who had defied the efforts of police, firefighters and coastguards to pluck her from treacherous mudflats.

So the rescuers had to think imaginatively, and came up with the idea of attaching a sausage to a drone and hoping the scent of the treat would tempt Millie to safety. It worked gloriously and Millie has been reunited with her grateful owner after following the dangling sausage to higher, safer ground.

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UK government puts animal welfare policies on pause

Delayed legislation includes ban on trophy hunting imports and stricter sentences for puppy thieves

Some of the government’s most prized new animal welfare policies are being put on pause in what supporters see as a sneaky attempt to ditch the “woke” measures altogether.

Senior sources in the Conservative party have confirmed to the Guardian that a series of policies including a ban on trophy hunting imports, stricter sentences for puppy thieves and a ban on live exports of livestock have been put on pause after a campaign led by Mark Spencer, the chief whip.

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‘Terrorising us’: bluebottles wash up on Australian beaches in ‘gobsmacking numbers’

There’s still much to learn about these ‘strange alien creatures’, but climate change likely to create ideal breeding conditions, expert says

Armadas of alien-like sea creatures have been washing up on Australian beaches thanks to the warm weather but experts warn people should look but not touch.

Jellyfish expert Dr Lisa-ann Gershwin said bluebottles had been washing up on beaches across New South Wales, Victoria, South Australia and Tasmania in “gobsmacking numbers” over the last few months thanks to the warmer weather.

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Hong Kong to cull thousands of hamsters after Covid found on 11

Authorities call for animals to be surrendered for ‘disposal’ after traces of virus detected at pet shop

Hong Kong has ordered thousands of hamsters be surrendered for “disposal” after traces of Covid-19 were found on 11 animals in a pet shop.

The order includes pets that were bought days before Christmas be handed over, with a warning not to “kiss or abandon them on the street” as Hong Kong and mainland China attempt to sustain a zero Covid strategy, attempting to suppress all outbreaks internally while maintaining tight border controls with the outside world.

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Finland, Sweden and Norway to cull wolf population

Conservation groups appeal to EU to take action against slaughter they allege flouts rules

Finland is joining Sweden and Norway in culling wolves this winter to control their population, as conservation groups appeal to the European Union to take action against the slaughter.

Hunters in Sweden have already shot dead most of their annual target of 27 wolves, while Finland is to authorise the killing of 20 wolves in its first “population management cull” for seven years.

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‘They saw bigger things’: Richard Leakey, Edward O Wilson and Thomas Lovejoy remembered

Friends and colleagues pay tribute after the recent deaths of these groundbreaking naturalists, who shifted our understanding of the world and our future

Over Christmas and the new year, three of the world’s leading naturalists died. Thomas Lovejoy, a conservation biologist credited with popularising the term “biodiversity” and a passionate defender of the Amazon, died on 25 December. A day later, Edward O Wilson, known to many as the “modern-day Darwin”, died in Burlington, Massachusetts. On 2 January, Richard Leakey, a world-renowned Kenyan conservationist who helped establish Africa as the birthplace of humankind, died at his home in Nairobi.

From presidents to undergraduate students, thousands have paid tribute to the three men, whose achievements range from developing theories on forest and island ecosystems to reforming the Kenyan civil service and devising proposals to protect half the planet for nature. Alongside grand accomplishments, which were sometimes controversial, their passing has been a chance to reflect on the small and the mundane: fleeting interactions that inspired careers, kind words that propelled research projects, and generosity of spirit that has helped amplify the voices of those that practise and produce science.

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Revisited: Could bringing back its love song save one of Australia’s rarest songbirds?

It wouldn’t be Guardian Australia ‘best of’ series without a bird episode! The regent honeyeater is an endangered native Australian songbird, with only a few hundred left in the wild. A few years ago scientists noticed something odd – they were mimicking other birds, and unable to sing their own song. Environment reporter Graham Readfearn and Dr Joy Tripovich explain how this species lost its song, and whether teaching it how to sing again could help save it from extinction

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Why pig-to-human heart transplant is for now only a last resort

Analysis: As doctors monitor world’s first human recipient of pig heart, safety and ethical concerns remain

The world’s first transplant of a genetically altered pig heart into an ailing human is a landmark for medical science, but the operation, and the approach more broadly, raise substantial safety and ethical concerns.

Surgeons at the University of Maryland Medical Center spent eight hours on Friday evening transplanting the heart from the pig into 57-year-old David Bennett, who had been in hospital for more than a month with terminal heart failure.

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China: more than 80 ostriches filmed running through the streets of Chongzuo – video

Footage has emerged of a group of ostriches on the run through the streets of Chongzuo in China.

It is believed the ostriches escaped from a farm owing to the gate not being closed properly, according to local media.

No injuries were reported and the owner managed to recapture the majority of the ostriches with the help of the police.

The incident occurred in the early hours of Saturday and no injuries were reported

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Hungry badger may have uncovered Roman coins in Spanish cave

The ‘exceptional find’ was discovered only feet from a badger’s den in the northern region of Asturias

A trove of 209 Roman coins in a cave in northern Spain – hailed by researchers as an “exceptional find” – is believed to have been uncovered by a badger desperately foraging for food.

The coins, dating from between the third and fifth century AD, were spotted in a cave in the municipality of Grado in the northern region of Asturias. They were found mere feet from the den of a badger, months after Storm Filomena dumped heavy snow across swaths of the country.

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‘I kept saying – don’t worry Luma, we see you’: Andrea Arnold on her four years filming a cow

The Oscar-winning director’s new documentary explores warmth, joy and anger through the eyes of a farmyard animal. She reveals what it taught her about life

Andrea Arnold’s films are known for their spare dialogue, and in her first documentary it is more pared-backed than ever: Cow consists of 94 minutes of moos, with the odd off-camera interjection from farmhands. It is hardly a thriller (though the ending is pure Tarantino). But it is one of the most beautifully crafted and tender portraits of a life you are likely to see.

Arnold, who started her professional life as a rollerskating TV presenter on the children’s Saturday show No 73, began thinking about documenting an animal’s life nine years ago. Eventually she settled on a cow. “I thought a cow would be interesting because they work so hard, getting pregnant and giving milk their entire lives. It’s a huge job they do.” She chose Luma because she was told she had a big personality and was feisty. Arnold and her team spent four years, on and off, filming her. Why did she make Cow? “I wanted to show a non-human consciousness. I was intrigued as to whether we would be able to see her consciousness if we followed her long enough.”

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German police dogs sent off duty after ban on ‘pulling collars’

Method used to control dogs while making arrests illegal under new animal rights law

Berlin police dogs trained to attack perpetrators have been put on an enforced break, along with their handlers, over contradictions between the methods used to control them and a new law to prevent cruelty to dogs.

The use of pulling collars to channel a police dog’s aggression towards an agitator or potential criminal contravenes the law, introduced by the former agriculture minister, which came into force on 1 January.

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‘A real miracle’: dog saves injured hiker stranded in Croatian mountains

Dog kept man warm and safe until rescuers found him

A dog saved a hiker injured in the Croatian mountains by lying on top of him for 13 hours until they were rescued, according to local media.

The dog, called North, kept Grga Brkic warm after he fell while out hiking and was unable to move. The other two hikers with him were unable to reach them, so they raised the alarm.

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Bear caught on camera stealing kill from wolves in Yellowstone park – video

Wildlife officials in Yellowstone national park captured the unusual sight of a cheeky grizzly bear tagging along with a pack of hunting wolves, then making off with their kill.

The enthralling video, posted to the National Parks Service Facebook page, shows the October incident in which the wolves from the Junction Butte pack in northern Yellowstone were joined by a lumbering grizzly as they hunted a herd of elk

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What’s new, pussycat? How feline film stars are trained to perform

From Stuart Little and Pet Sematary to new movie The Electrical Life of Louis Wain, cats can be scene-stealers. But how do you get such fickle and independent creatures to behave on camera?

Cats have been effortlessly stealing scenes from their human co-stars for decades. Who could forget Audrey Hepburn’s adorable marmalade tabby in Breakfast at Tiffany’s? Or Jinx, the toilet-flushing Himalayan in Meet the Parents? Behind every famous film cat, there is a dedicated trainer patiently teaching them to obey a command, making sure they’re happy on set, and grooming them fastidiously to maintain their fluffy good looks.

The film-makers behind The Electrical Life of Louis Wain, a British period biopic about the Edwardian artist and illustrator who became famous for his surreal portraits of cats, were adamant they didn’t want to use CGI for the shoot, so animal trainer Charlotte Wilde was brought in with 40 feisty felines. “It was organised chaos,” she says. “They had their own green room and were treated like royalty.”

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UK zoo helps lost Mexican fish live to see another Tequila sunrise

Declared extinct in the wild in 2003, species has been reintroduced to its native river after being bred in Chester

A “charismatic little fish” declared extinct in the wild has been reintroduced to its native Mexico after being bred in an aquarium at Chester zoo.

The tequila fish (Zoogoneticus tequila), which grows to no bigger than 70mm long, disappeared from the wild in 2003 owing to the introduction of invasive, exotic fish species and water pollution.

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Plastic beads could make nets more visible to cetaceans, scientists say

Beads add hardly any extra weight to fishing gear and could save thousands of lives, it is claimed

Simple plastic beads could save the lives of some of the thousands of porpoises and other cetaceans that get caught in fishing nets each year, scientists say.

Harbour porpoises use echolocation to find their prey and for orientation. However, their acoustic signals cannot pick up the mesh of a gillnet, and as a result they often become trapped.

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