Oil spill threatens vast areas of mangroves and coral reefs in Brazil

Pollution stretches across 2,400km of coastline, with scientists fearing contamination of food chain

Hundreds of kilometres of mangroves and coral reefs, as well as humpback whale breeding grounds, are under threat from an oil spill that has polluted more than 2,400km of Brazil’s north-eastern coast in the last two months.

The Brazilian Navy, which has deployed 8,500 personnel, 30 ships and 17 aircraft in the cleanup operation, said this week that 4,200 tonnes of oil have been removed from beaches, amid fears by scientists that some has already entered the food chain.

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To the moon and back with the eastern curlew

Ultra-endurance athlete, aerodynamic wonder … and facing extinction. Why the bird who flies 30,000km a year needs Australia’s mudflats

Vote for your favourite in the 2019 bird of the year poll

The ascent is vertical. Up, up and into the jet stream. If the conditions are not right up there it will come back down and wait. But if there is a good tailwind in the right direction it will begin an epic journey that will take it around the curvature of the Earth; from the Arctic Circle to the southern hemisphere.

Using the sun and stars as a compass, and navigating by the Earth’s magnetic field, recognising landmarks, the far eastern curlew will fly nonstop to the Yellow Sea, where it fuels up on the mudflats of north-east China.

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Hundreds of koalas feared burned alive in out-of-control bushfire near Port Macquarie

Blaze around Lake Innes and Lake Cathie in northern NSW has destroyed more than 2,000 hectares and spread smoke haze to Sydney

Hundreds of koalas are feared to have died in an out-of-control bushfire in northern New South Wales which has raged unchecked for days in the heartland of their prime habitat.

The blaze, reportedly caused by a lightning strike near Port Macquarie, has burned more than 2,000 hectares, including an important koala breeding ground.

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Grandmothers go underwater to uncover population of lethal sea snakes – video

A group of women in Noumea who swim and snorkel up to 3km five days a week have uncovered a large population of venomous sea snakes in the Baie des Citrons where scientists once believed they were rare. The citizen scientists, aged in their 60s and 70s, call themselves 'the fantastic grandmothers’. They swim with the 1.5-long lethal greater sea snakes, documenting the local population with cameras to take note of their breeding habits and share them with experts

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Second whale found dead in Thames in less than two weeks

Discovery of whale’s body near Gravesend follows death of young humpback this month

A second whale has been found dead in the Thames less than two weeks after a humpback nicknamed Hessy died near the same stretch of water.

The Port of London Authority confirmed the suspected fin whale was discovered in the river at Denton, near Gravesend, on Friday morning.

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The ‘blob’: zoo showcases slime mold with 720 sexes that can heal itself in minutes

The unusual organism has no mouth but can detect and digest food, and no brain yet can learn

A Paris zoo has showcased a slime mold, dubbed the “blob”, a yellowish, unicellular, small living being which looks like a fungus but acts like an animal.

This newest exhibit of the Paris Zoological Park, which goes on display to the public on Saturday and is widely used in scientific experiments, has no mouth, no stomach, no eyes, yet it can detect food and digest it.

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Footage shows world’s fastest ants at top speed – video

New video footage reveals the world's fastest ants galloping across the scorching sand of the Sahara at speeds approaching one metre per second, which is the equivalent of a house cat tearing about at 120mph.

Researchers have found that at full pelt the Saharan silver ants can travel 108 times their body length per second in gallops that brought all six legs off the ground at once

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Last wolves in Africa: the fragile wildlife of Ethiopia’s ravaged parks | Tom Gardner

Wildfires and an encroaching population are threatening grasslands that host some of the world’s rarest species

Conservationist Getachew Assefa points across the valley. “It started close to the mist over there, by the most spectacular viewpoint,” he says. “Almost all the grassland was burnt. All of that plateau and the steep cliff over there.”

Six months after wildfires torched this part of Ethiopia’s Simien Mountains, the scars are healing: heather and grass have returned to carpet the hilltop, brightened by the yellow daisies which bloom after the long rains. On the near side of the valley lie barley fields, rippling in the wind.

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Two-thirds of bird species in North America could vanish in climate crisis

Continent could lose 389 of 604 species studied to threats from rising temperatures, higher seas, heavy rains and urbanization

Two-thirds of bird species in North America are at risk of extinction because of the climate crisis, according to a new report from researchers at the Audubon Society, a leading US conservation group.

Related: Record numbers of Australia's wildlife species face 'imminent extinction'

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Humpback whale found dead in Thames was hit by a ship

Investigators say it is unclear whether wound happened before or after its death

A humpback whale that died after swimming into the Thames was hit by a ship, the Zoological Society of London (ZSL) has said.

However, it is not clear whether the wound on the juvenile female was inflicted before or after its death.

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Eleven elephants die after falling into waterfall in Thailand – video

Wildlife officials in Thailand have discovered the carcasses of five more wild elephants downstream from a waterfall where the bodies of six other elephants were found on Saturday. 

The animals were originally thought to have died while trying to save each other after falling into a waterfall at Khao Yai national park, but a drone being used to investigate the deaths later identified five further carcasses, including that of a three-year-old calf.

Only two elephants in the herd are known to have survived the fall at the 200-metre-high Haew Narok waterfall in Thailand's mountainous north-east

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Six wild elephants die trying to save each other in Thai waterfall

Incident reportedly happened after baby elephant slipped over falls

Six wild elephants have died while trying to save each other after falling into a waterfall at the Khao Yai National Park in Thailand.

Two others were saved during the incident on Saturday at the Haew Narok waterfall in the north-eastern province of Nakhon Ratchasima, officials said.

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Environment groups offer €30k reward to identify wolf’s killer

Naya, the first wolf sighted in Belgium for a century, believed to have been killed by hunters

Environmental groups are offering a €30,000 (£27,000) reward for information that helps identify who killed Naya, the first wolf sighted in Belgium for a century when she entered the country last year.

The wolf’s arrival completed the return of the predator to every mainland country in Europe, turning back decades of persecution.

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Belgium’s first sighted wolf in a century feared killed by hunters

There has been no sign of Naya or the pups she was carrying since May

The first wolf to have been sighted in Belgium for more than 100 years has not been seen since May, and environmentalists believe she is likely to have been killed.

The wolf, given the name Naya, was first sighted in Belgium in the north-east province of Limbourg in January 2018. She was fitted with a collar containing a transponder to track her movements.

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Indonesia cancels Komodo island closure, saying tourists are no threat to dragons

U-turn announced after environment minister said populations of the ancient lizard remained stable despite influx of visitors

Indonesian authorities have cancelled plans to close Komodo island to tourists, with the country’s environment ministry saying that Komodo dragons living there are not under threat from over-tourism.

In July, authorities in East Nusa Tenggara province said that the island would be closed for one year from January 2020 to stop tourists interfering with the natural behaviour of the largest species of lizard on earth. On Monday Siti Nurbaya Bakar, Indonesia’s environment and forestry minister, said the move was off.

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‘A very special place’: Lundy’s future secure for another 50 years

Lease extended on island off Devon – a haven for wildlife and seekers of the quiet life

The future of an island off the Devon coast that has been transformed from the haunt of pirates and chancers into a haven for wildlife and seekers of the quiet life has been secured for another half century.

A fresh 50-year agreement between the charities that own and run Lundy is being signed that will offer protection for the flora and fauna (and the hardy humans) who live on the weather-battered hunk of granite in the Bristol Channel.

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US and Canada have lost three billion birds since 1970

More than one in four birds have been lost across diverse groups and habitats, in what researchers describe as a ‘wake-up call’

The US and Canada have lost more than one in four birds – a total of three billion – since 1970, culminating in what scientists who published a new study are calling a “widespread ecological crisis”.

Researchers observed a 29% decline in bird populations across diverse groups and habitats – from songbirds such as meadowlarks to long-distance migratory birds such as swallows and backyard birds like sparrows.

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Outrage in China as giant panda on loan to Thailand zoo dies

Chuang Chuang reportedly collapsed after eating bamboo in Chiang Mai Zoo

The sudden death of a giant panda on loan to a zoo in Thailand has sparked outrage in China and calls for no more of the bears to be lent to the country.

Chuang Chuang, a 19-year-old male, reportedly collapsed on Monday afternoon after eating bamboo in Chiang Mai zoo in northern Thailand, according to Thai media.

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Half of tigers rescued from Thai temple have died, officials say

Inbreeding blamed as only 61 of 147 big cats survive after removal from tourist attraction

More than half of the 147 tigers confiscated from a Thai temple have died, park officials have said, blaming genetic problems linked to inbreeding at the once money-spinning tourist attraction.

For years, the Wat Pha Luang Ta Bua temple in the western province of Kanchanaburi attracted hordes of tourists who could be photographed – for a fee – next to scores of tigers.

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