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All about forests, rivers, oceans
Australia orders Japanese whalers to stay away
Esther Woolfson's urban nature diary
Ladbrokes is gambling with fish extinction and so is the government
US wildlife officials propose endangered status for wolverines
The hare's death-scream tells of a history soon over
The ethics of keeping a killer cat
It's as if the landscape and stream are caught amid their own owl dreams
Many more seabirds may be affected by Channel pollution, RSPB says
Leading paper firm pledges to halt Indonesian deforestation
Fishing campaigners urge MEPs to vote for discards reform
Dog attack law to be extended to cover incidents on private property
The return of grey wolves 'not enough to restore Yellowstone's ecosystem'
Oil additive polymer PIB may be responsible for seabird deaths
MEPs vote to ban discards in historic reform of fishing policy
All dogs in England to be microchipped by 2016
Some of nature's mysteries are all the better for going unsolved
First the internet, now Monopoly cats have got our attention
Polar bears 'may need to be fed by humans to survive'
Invasive mussel poses ecological and economic threat to island community
Ancestor of humans and other mammals was small furry insect eater
Conflict in DRC Congo threatens chimpanzee tourism programme
The intruder, a raven, passed through the treetops into view
The horsemeat scandal: could there be much more to come?
Circuses remove last of the big cats from UK's big tops
  Environment Pollution Pollution that killed seabirds cannot be traced, rules investigation
The source of the pollution that killed hundreds of seabirds off the UK coast may never be known after the maritime and coastguard agency said it had wound up its investigation.

A major rescue operation was launched after birds, mainly guillemots, washed up along south coast beaches earlier this month, coated in a sticky substance.

The substance was eventually identified as PIB polyisobutene which is used in products ranging from adhesives to sealants and even chewing gum.

Scientists at Plymouth university concluded it was most likely a form used as an additive in lubricating oil. But attempts to find the PIB source have foundered.

The MCA said it had been trying to establish the source of the product. The spokeswoman said: "After tests were carried out, it was identified as [PIB]. This is a fairly common chemical carried aboard ships and it is produced in a large number of countries.

"Despite further tests, we have been unable to identify specific components of the product that may have helped us find the source.

"We did not receive any reports of pollution within the Channel area at the time when the birds were coming ashore, but a MCA counter-pollution surveillance aircraft surveyed the Channel from Dover to the Isles of Scilly. In addition, images from the European maritime safety agency's satellites were reviewed. No pollution was detected.

"As such, we have concluded it is highly unlikely we will be able to link the pollution to any specific vessel. Unless we receive any new information, our investigation is now closed."

The RSPB said: "We are extremely disappointed that the source of the PIB release has not yet been found. PIB is believed to have been responsible for over 4,000 seabird deaths in at least four incidents around European coasts in recent years and is transported around the world on a growing basis, yet it remains legal to discharge it into the sea with conditions.

"The truth is we simply do not know how much PIB and other similar substances are released into the marine environment and what the wider impacts are on marine ecosystems, including seabirds.

"If this incident was the result of illegal activity then those responsible must be held accountable for their actions. Nevertheless, the RSPB is calling on the International Maritime Organisation to urgently review the hazard classification of PIB and implement regulations and regular monitoring of such discharges to prevent any further tragic and wholly avoidable incidents like the one just witnessed."
In the British countryside, alien species are not always undesirables
Pandas keep Scotland guessing over mating game
US plan to control Guam's snake population with toxic mice angers Peta
African lions the killer kings in mortal danger from man and sham medicine
EU fish discards deal welcomed by UK
Pilot badger culls set to go ahead
Scientist calls Hugh's Fish Fight 'a tawdry piece of hack journalism'
A couple of interesting visitors have arrived at the lakes in the past week
Sea Shepherd conservation group declared 'pirates' in US court ruling
Schmallenberg virus found in farm animals in almost all of Britain
Gardens: wildlife surveys
Tackling the illegal trade in wild animals is a matter of global urgency
100 million sharks killed each year, say scientists
The snipe's 'drumming' sound is perfectly evocative of Welsh hill country
Sharks at risk of extinction from overfishing, say scientists
Thailand's prime minister pledges to outlaw domestic ivory trade
Humans are not the only animals to enjoy alcohol
China must send a clear message to consumers on ivory trade
Google shopping adverts fuel ivory trade, conservation group warns
Two-thirds of forest elephants killed by ivory poachers in past decade
US and Russia unite in bid to strengthen protection for polar bear
Blackbird singing in the dead of night
Above the loch, the scene was dominated by the abundant birch trees
Lion kills intern at California animal sanctuary
Bid to halt polar bear trade fails
Deer culling on massive scale backed by expert
Scores on the paws: how one man changed the shape of dogs to come
Cites: bid to curb sale of ivory and rhino horn voted down
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Geoffrey Matthews obituary
World's largest captive crocodile dies in Philippines
Urban foxes: the facts and the fiction
Albatross astonishes scientists by producing chick at age of 62
Knut the polar bear lifesize model to go on show in Berlin
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Foxes' friends and foes say an urban cull is not the answer
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Action on dangerous dogs has been 'woefully inadequate', MPs warn
Why Hugh Fearnley-Whittingstall's Fish Fight is still necessary
What the horsemeat scandal and fish quotas tell us about Europe
New to nature No 99: Phagocata flamenca
We can overlook the aesthetics of gulls, but they make grey beautiful again
Birdwatch: Stonechat
Environment Pollution Pollution that killed seabirds cannot be traced, rules investigation
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Bid to solve mystery of 50,000 red-breasted geese lost in migration
How a ferret took me on a journey to a saner world
Panda eyes focused as Yang Guang and Tian Tian seek each other out
So entrancing are the clouds that the deer are unnoticed until I shift my gaze
Anyone for camelcino? Camel milk set to be big business for east Africa
Red squirrel finds pine marten a fearsome ally in its fight for survival