The shocking research claims that three fifths of UK species are in decline and one in 10 are at risk of disappearing altogether. But there are a staggering 1500 wildlife sites in London, working hard to reverse that trend.
Martin Stew has more.
The report is being launched by Sir David Attenborough, who said: "This ground-breaking report is a stark warning - but it is also a sign of hope.
"For 60 years I have travelled the world exploring the wonders of nature and sharing that wonder with the public. But as a boy my first inspiration came from discovering the UK's own wildlife.
"Our islands have a rich diversity of habitats which support some truly amazing plants and animals.
"We should all be proud of the beauty we find on our own doorstep; from bluebells carpeting woodland floors and delicately patterned fritillary butterflies, to the graceful basking shark and the majestic golden eagle soaring over the Scottish mountains.
"This report shows that our species are in trouble, with many declining at a worrying rate."
In the first study of it's kind, researchers are warning London's wildlife is under major threat. The wide-ranging study by a coalition of conservation and research groups blames the decline of heathland, woodland, and gardens in the capital for the threat to our native species.
The stock-take reveals 60% of the species studied have declined over recent decades.
London's wildlife is in trouble, according to a wide-ranging study published today by a coalition of conservation and research groups. London's heathland and woodland are under threat as are the capital's gardens and other informal spaces.
Scientists working side-by-side from 25 wildlife organisations have compiled a stock take of our native species; the first of its kind in the UK. The State of Nature report reveals that 60% of the species studied have declined over recent decades.