IN THE BRITISH COUNTRYSIDE, HEDGEHOGS aren’t easy to find. That’s partly because the spiky little critters are most active at night, and prefer quiet, undisturbed corners of the landscape, such as hedgerows. They’re also tough to track, since hedgehogs are pretty tidy travelers. They don’t leave prominent signs behind, such as notable piles of scat or scratches on trees. And they vanish for a solid chunk of the year, hibernating on and off from frost to thaw.