Is it the end for Britain’s hedgehogs?

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As hedgehogs all over the wake up from their winter hibernation, activists will be carefully counting their hogs. Every year, the hedgehog population in ’s rural towns declines by an estimated 5 percent. But between 2011 and 2012, a survey conducted by the People’s Trust for (PTES), a UK-based animal activism group, saw the country’s European hedgehog (Erinaceus europaeus) population fall a dismal 32 percent.

England’s dropping hog population begins to look dire – Photo by: Gaudete.

A ten-year long analysis by PTES and the British Hedgehog Preservation Society (BHPS) only underlined the grim evidence of Britain’s hedgehog decline. In fact, PTES Surveys Officer David Wembridge likens the hog’s decline to that of the tiger’s: “Over the last twenty years or so, the world’s tiger population is thought to have halved. Although they are very different …the fact that we are losing hedgehogs in Britain as quickly should ring alarm bells as loudly.”

No one knows why the hedgehog population is falling so fast. Leading theories cite increased agriculture and use of , which may poison hedgehogs and their food, as well as a rise in road traffic.

“Tens of thousands of hedgehogs are killed by road traffic each year and road deaths might be an important cause of decline locally. Spines are little defense against wheeled predators,” reads a report by PTES and BHPS.

Hedgehogs have also collided with unfamiliar, urbanized England. The BBC reported on multiple hedgehogs who found trouble in the big city. Most notable are the stories of a hedgehog found hiding in a chips bag in a walled-off area of the town of Weston-super-Mare, and a hedgehog found with its head stuck in a carrot can in a city near Norfolk. However, these instances are hardly rare: hedgehog population density is highest in the suburban areas, with its open grass and few natural predators. Both trapped hedgehogs were rescued by local animal clinics and released in a less populated environment.

Loss of the hedgehog in Britain could be disastrous. Biologists report in the UK Mammal survey that hedgehogs are a good indicator of the health of ecosystems such as hedges and meadows, as well as a good population indicator for bugs such as earthworms, slugs, and beetles (their main food source), and therefore a good indicator of soil health. The hedgehog’s decline has sparked studies on other ecosystem residents in the UK, and concern is rising.

But it’s not quite time to write off the hedgehog. Almost all the research on hedgehog population has come not from scientists, but from the public. PTES has organized citizen-powered programs such as HogWatch, Hedgehog Street, and on . Collecting valuable data, thousands of hog-loving citizens have logged hedgehog sightings, recorded hedgehog corpses on the sides of local highways, and have begun to make “hedgehog-friendly gardens” at home. Online, PTES writes, “…surveys record species other than hedgehogs and together provide an insight into the changing fortunes of wild mammals in urban and rural habitats.” And in the age of technology, activism has never been easier: the Mammals on Roads study comes with its own iPhone app, where participants log their hedgehogs.

“It is a popular species and draws the attention of the public to wildlife,” writes Jessamy Battersby for the UK Mammals Species Status and Population Trends report. Although its future may look bleak, it seems that Britain’s hedgehogs are not without friends.

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Susan Lee

I would put the culprit as humans’ uses of pesticides AND herbicides all affecting the insects and worms that are the hedgehogs’ main feeding staple.