The Marsh Frog (Rana ridibundus) is a very large species of frog which inhabits South East England.
The Marsh Frog is a water-dwelling, generally green-colored frog species. It can reach a maximum length of 17 centimetres, but males remain smaller (around 12 cm). The head is proportionally large and the hind legs are long, which gives them excellent jumping abilities.
There is a large variation in colour and pattern, ranging from dark green to brown or grey, sometimes with some lighter green lines; a lighter line on the back is generally present. The Western European populations are generally dark green to black with dark spot on the back and sides and three clear green lines on the back.
The diet of the Marsh Frog consists of dragonflies and other insects, spiders, earthworms and slugs. Larger frogs also eat small rodents and sometimes smaller amphibians and fish.