About Pelophylax chosenicus (Okada, 1931)
The Seoul frog, also called the Seoul pond frog or gold-spotted pond frog, has the scientific name Pelophylax chosenicus. It is a species of true frog that occurs on the southern and western Korean Peninsula, and may also be found in Liaoning, China. It is closely related to the eastern golden frog Pelophylax plancyi, and was long treated as a subspecies of that species. Although it is sometimes called a pond frog, it does not belong to the genus Rana; it is instead a member of the water frog genus Pelophylax, which is currently recognized as separate from Rana.
Adult Seoul frogs reach roughly 6 centimeters in length. Their back is bright green and bumpy, with light brown patches, while their belly is yellowish-red. The iris of the eye is golden, and the overall body shape is round, appearing swollen. This species lives in ponds and rice paddies, but its population has declined sharply, most likely due to habitat degradation. According to Matsui (2004), recent surveys have only found populations of the Seoul frog at four locations. The species' mating season runs from mid-May to June, and it is listed as an Endangered category II species in South Korea.
