It makes the news if the police are seen helping ducklings cross the road.My fav sign is in town: please slow down for otters crossing this, right outside tesco superstore! Lol
Yes I believe these and hedgehogs have a tunnel system in place around here. Or at least I know of that.Not a sign but,
I saw an advertisement recently for helpers wanted for patrolling the main road near us for frogs crossing near the reservoir.