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Britain's largest fly has been found in Devon

This is the first time in 15 years that the hornet robberfly has been found in the area. Credit: National Trust

An enormous predatory fly - the largest in the country - has been found at a National Trust farm in Devon.

The hornet robberfly is harmless to humans, but it's a "fearsome predator" of grasshoppers, and its larvae feed on the beetle grubs in cow dung.

Once common across southern England, its numbers have fallen dramatically due to losing its habitat - and this is the first time it has been seen on the East Soar farm near Bolt Head in 15 years.

Credit: National Trust

"We were both surprised and delighted to find this spectacular fly, Britain's largest, on National Trust land near Bolt Head."

– Rob Wolton, who discovered the fly

"A lot of work has been carried out by the Trust and our tenants over the last 4 years to improve the condition of the coastal area for the benefit of a wide range of wildlife. We are really pleased to see discoveries like the hornet robberfly which would not survive without the right grazing conditions."

– Emma Reece, National Trust Area Ranger