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Creatures, including bats, dormice and great crested newts, have also been moved.

Ten tiny hazel dormice have been given the all-clear by wildlife vets ahead of their release into the wild next month.

"While the Romans had to wait centuries for pasta, they chowed down on dormice in fish sauce," he said.

Forestry England, which set up the crossings, said they would "enable dormice to feel safer as they cross from one part of the wood to another".

To test this, they took skeletal muscle samples from two small hibernators -- the Thirteen-lined ground squirrel and the Garden dormouse -- and two large hibernators -- the American black bear and brown bear.