Ynghylch

The Deathwatch beetle is a medium-sized beetle. The larvae live in dead wood, in old trees and in buildings: their tunnelling can cause major damage to wood beams and floors, and to wooden furniture. Adults emerge during the spring, leaving holes of about 4mm across in the wood. The adults make tapping noises against the dead wood to attract mates; the females then lay their eggs in crevices in the wood.