As you may have discovered with America's speed control mammal - deer - hitting a large living organism can ruin your whole day, and depending on your deductible, your monthly budget.
It's not a picnic for the animal in question either.
Scientists are looking for a better way to get the chicken across the road - even though we don't know why they do it.
"We know that some species — grizzly bears, wolves, elk and deer, also moose, prefer large structures," Dr. Clevenger said. "Cougars and black bears prefer the opposite — very constricted structures with lots of cover." Sometimes a pack of wolves will approach a crossing, but if only some are willing to chance it the pack as a whole may not cross. The scientists are trying to figure out a crossing design that will encourage packs to move en masse.[Link]