X-ray of a snapping turtle (Chelydra serpentina). This particular turtle is a female and is full of eggs. This specimen was collected after it was killed by a car -- look closely at the x-ray and you can see extensive shell damage as well as a number of unlaid eggs. This freshwater turtle is found in wetlands throughout North America, from southern Canada to the Gulf of Mexico. An adult can have a shell length of around 45 centimeters. They feed on whatever they can catch in their powerful beaks, including fish, birds, mammals, amphibians and carrion.