My mom has a similar joke when we lived in California. During the late summers till mid winters, Turkeys would flood the small areas filled with offices. Since it was kind of a main road, we would usually take it to get from A to B. Each time we saw a turkey, my mom would complain how much she would like to run one over, and I made the joke of scoring 10 points if we did hit it. From then on, we would count how many points we could have scored when we drove on that road.
I moved to Texas about 2 years ago, and there are no wild turkeys here... but there are vultures and ducks. Ducks are worth 5 points, and vultures are worth 15...