|Bat bridge beyond railway bridge|
One of the routes is along a hedgerow that is now about 5 metres above the newly excavated road and this is where the bridge spans the gap. Either side of the bridge is a solid 6 foot wall to shield the light averse bats from the beams of traffic passing below. Elsewhere the bypass has been built on an embankment and in these places culverts have been constructed along the lines of hedgerows to help the bats pass beneath the road without injury. In a couple of places these culverts are a massive 4 metres in height and width.
If you want to see what lesser horseshoes look like this is a short film of a hibernation count, under licence with the Gwynedd Bat Group, in the Vale of Ffestiniog. These might be some of the users of the maternity roost near the bypass.