Late one Friday evening in early March, I received a most peculiar message. A local birdwatcher had been wandering along a forest ride in the Derwent Valley in the Peak District National Park when he had come across the body of a squirrel, lying on its back, on top of a wall.
On closer examination, he saw the animal was lying on a mat of strands of baler twine and that a translucent substance had been applied in obvious…