This frog genus is represented in Greece by the following six species, two of which are endemic: P. bedriagae is widespread in E. Mediterranean and the Middle East (Egypt, Israel, Jordan, Lebanon, Syrian Arab Republic, and Turkey). In Greece, it is present on E. Aegean islands (Lesvos, Chios, Ikaria, Samos, Kos, Kalymnos, Rodos and Symi) and in the eastern part of Thraki. It is also on Cyprus. This species is strongly aquatic, inhabiting permanent ponds, streams, rivers, marshes, irrigation channels, and the surrounding terrestrial habitats. An endemic to Karpathos Island, P. cerigensis is a Critically Endangered species known from just a single location on the island. P. cretensis is another insular endemic species listed as Endangered due to its limited and fragmented distribution on the island of Crete. Both P. cerigensis and P. cretensis occupy slow-moving rivers and streams. P. epeiroticus and P. kurtmuelleri are both native to Albania and Greece (P. epeiroticus extends from Ipeiros to the Peloponissos) and despite the fact that the former is sparsely distributed and listed as Vulnerable in the IUCN Red List, the latter is widely distributed in both countries and is expanding its range in Italy, where it was introduced in 1941. P. ridibundus is widespread in Europe and Asia, extending from Spain eastwards to Kazakhstan and from Iran northwards to the United Kingdom. It has been introduced in many of the countries of its current distribution, such as the U.K., Switzerland, Belgium, Spain, Russia (Siberia and Kamchatka), and northwestern Xinjiang (China). Isolated populations can also be found in Bahrain and Saudi Arabia. The taxonomic status of the Anatolian populations still remains unclear. In Greece, some of the above species can be found in sympatry, for example P. kurtmuelleri with P. epeiroticus in western Greece and with P. ridibundus in Thraki. Those three species prefer open, warm areas with herbaceous vegetation and can survive in saline waters, with the first two considered to be more aquatic than the third.