Conservation
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Fish under threat from ocean oxygen depletion, finds studyOxygen levels in oceans have fallen by 2% in 50 years due to climate change, affecting marine habitat and large fish such as tuna and sharks
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The week in wildlife – in picturesSea turtles laying eggs, buffalo and a swan lake are among this week’s pick of images from the natural world
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UK legislation to ban ivory products from across history would criminalise some of the greatest art the world has seen. We need reason, not passion, in the fight against poachingIvory tells the history of the world – it must never be banned
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Mary Welsh obituaryOther lives: Naturalist whose books inspired thousands to explore northern England and Scotland
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Group of 'extinct' antelope released into wild in southern SaharaConservationists hope second group of 14 scimitar-horned oryx bred in captivity will help repopulate original habitat in Chad
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Act now before entire species are lost to global warming, say scientistsClimate change is threatening about 700 endangered species and policymakers must act urgently to lessen impact
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'What can I do to help elephants?'Climate change, poaching, competition for food and water… elephants have never faced such threats. Here are more than 50 ways to give them a helping hand. Can you add to the list?
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Why we need to map all Earth’s critters, quickLetters: To date we have only mapped 20% of all known species, with invertebrates and the “small things” being the most elusive
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UK's cash-starved parks at tipping point of decline, MPs warnSlashed budgets risk the nation’s 27,000 parks becoming no-go areas, with negative effects on park-goers’ health and the environment
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Perth festival opens with an exquisite million-dollar spectacle – and an urgent warningIn the open-air spectacular Boorna Waanginy, scientists, botanists and school children came together with Noongar elders to deliver a powerful message
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Environmentalists warn of bumblebee's extinction after Trump halts regulationsOrder for 60-day pause on regulations not yet implemented includes protection for endangered rusty patched bumblebee, which experts say is near extinction
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The world's most unloved, underappreciated wildlife – in picturesDo you like pangolins or silky sharks? How about the black-legged kittiwake? Vote for your favourite in the Wildscreen Arkive’s Valentine’s Day campaign to help protect underappreciated species from poaching and climate change
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No wildlife charity campaigns to save parasites. But they shouldWe tend to think of parasites as harmful, itchy, nasty, creepy crawlies. But these strange, beautiful creatures have many uses – and they need our help
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Tesco's plan bee: spilt supermarket sugar to help feed hungry honey beesRetailer’s waste sugar makes beeline for Cornish apiculture scheme as winter nectar shortage further hits stricken species
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Irish trawlers accused of 'alarming' abuses of migrant workersDespite efforts to give non-EEA fishermen legal status, workers say they do 100-hour weeks with insufficient rest
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Elephants in crisis: MPs accuse government and Europe of dragging their feet over ivory ban‘This is the last chance saloon,’ say politicians and campaigners pushing for urgent action
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Patagonia pulls out of Utah trade show in protest of state's public land grabCompany founder has urged Utah governor to stop trying to undo the decision by former president Obama to create the Bears Ears National Monument
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You can do your bit to support hedgehogsLetters: We ask people to create 13cm square gaps in the bottom of their boundary fences and walls to join up usable habitat
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There’s no point having conservation areas if they are not conserved. The government’s ruling on Paddington cube will be pivotalDon’t let philistine developers wreck our urban heritage
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Hedgehogs now a rare garden sight as British populations continue to declineMore than half of people surveyed had never seen a hedgehog, once common in UK gardens
Radical Conservation ‘Insane’ camera trap video captures rare battle in the Amazon