"The bat bridge is a pole on either site of the road with a line of netting run between them. It was installed here, across the main road through Penmaen, in 2004. Bats don't fly in the open, but usually follow hedge and tree lines. Even something as apparently trivial as the removal of a hedge can disrupt their flight. Bats stay in vegetation to avoid predators, crossing roads at points where trees either side create a canopy, as here. The need for the bat bridge arose following the demolition of a nearby old railway bridge, part of a bat route, during the building of Sirhowy Enterprise Way."