Nanorana quadranus (common names: Kwang-yang Asian frog, swelled vent frog) is a species of frog in the family Dicroglossidae. It is endemic to central China. Its natural habitats are temperate forest and shrubland, with breeding taking place in small rivers. It is a common species believed to be declining. It is threatened by collection for food and also habitat loss. Nanorana quadranus are relatively large frogs: males grow to a snout–vent length of about and females to . Tadpoles are up to in length. References quadranus Amphibians of China Endemic fauna of China Taxonomy articles created by Polbot Amphibians described in 1960