The marsh frog (Pelophylax ridibundus) is Europe's largest frog and is identifiable by the inflatable vocal sacs on either side of its head. Its skin is warty and varies in colour from olive to bright green or brown, often with dark blotches. It can be found in a wide range of habitats, including marshes, ditches, ponds, and streams, and is one of the few frogs that can tolerate brackish water (a mix of freshwater and saltwater). A popular snack for herons, egrets and grass snakes, it is much more closely tied to water than the common frog and is almost always found either in the water or next to it. The marsh frog is widespread across continental Europe and into Western Asia, but have established introduced populations, most notably in the UK.
© BirdsImageStock