The Marsh Frog (Pelophylax ridibundus) is a large, robust amphibian native to Europe and parts of Asia. It has a green to olive-brown body with dark blotches and a lighter underside. It inhabits freshwater habitats like ponds, marshes, and slow-moving rivers. Known for its loud, distinctive croak, the Marsh Frog is a prominent part of its ecosystem, feeding on insects, small fish, and other invertebrates.