The American bullfrog (Lithobates catesbeianus) is a large amphibian native to North America. It typically measures 3 to 8 inches in length and is known for its distinctive green or brown skin with dark spots. These frogs are commonly found in ponds, lakes, and marshes, where they thrive in warm, shallow waters. American bullfrogs are carnivorous and primarily feed on insects, small fish, and other amphibians. They are known for their loud, deep croaking calls, especially during the breeding season. This species plays a vital role in its ecosystem by helping control insect populations and serving as prey for larger animals.