Overview: A twilight drama in the Somerset hedgerows As dusk settles over Westbury-sub-Mendip in Somerset, a quiet, twinkling drama unfolds beneath the hedgerows. Green sparks of light—tiny female glow-worms and their firefly cousins—signal a last-ditch mating season. These nocturnal creatures have long captured human imagination, but their numbers are dwindling in many regions. The question…