Dryophytes suweonensis

The Suweon treefrog has a lifestyle similar to the Japanese tree frog, breeding in rice paddies, and is not known to breed at any natural site. Factors distinguishing it from the Japanese tree frog include the call frequency, calling behaviour, webbing between the toes and the angle of the line between the eyes and nostrils, and microhabitat segregation also separates the two (Wikipedia, general species account). The source used here does not describe its range.