Pelophylax lessonae, commonly known as the pool frog, inhabits temperate regions of Europe. It displays a vibrant green coloration with dark spots and thrives in freshwater habitats like ponds and marshes. Notable for its distinctive croaking during mating season, it plays a crucial role in controlling insect populations.

Pelophylax lessonae, commonly known as the Pool Frog, is native to parts of Europe. Its geographical distribution includes countries such as Sweden, Norway, the United Kingdom (specifically, reintroduced populations), and various regions across Central and Eastern Europe including Poland, Germany, and parts of Russia. The species is also found in some Southern European countries like Italy and the Balkans.

The Pool Frog typically inhabits areas with fresh water bodies such as ponds, slow-moving rivers, lakes, marshes, and ditches. It prefers environments with abundant aquatic vegetation and shallow, warm waters. The climate in its habitat ranges from temperate to continental, experiencing seasonal variations with colder winters and warmer summers.

As an amphibious species, the Pool Frog plays a significant role in its ecosystem as both predator and prey. It primarily feeds on insects and other small invertebrates, contributing to the control of these populations. The species is adapted to a semi-aquatic lifestyle, requiring both terrestrial and aquatic environments for different stages of its life cycle, such as breeding in water and foraging on land.