One I've never seen before. And, in fact, no animals were anywhere to be seen. My experience is that despite sophisticated motorway signage such as this, I rarely encounter the thing I'm being warned about with the exception of fog. Fog signs, slightly paradoxically, don't usually give advance warning, they usually loom up, out of the fog itself. My experience of American motorway exit signs is that they are generally uninformative. They seem to major on the name of the exit road rather where its headed.