ウシガエル
The American bullfrog ("Rana catesbeiana"), often simply known as the bullfrog in Canada and the United States, is an aquatic frog, a member of the family Ranidae, or "true frogs", native to much of North America. This is a frog of larger, permanent water bodies, swamps, ponds, and lakes, where it is usually found along the water's edge. On rainy nights, bullfrogs, along with many other amphibians, travel overland, and may be seen in numbers on country roads.