Eastern Water Snake or Olive Keelback Sinonatrix percarinata is a species of snake found in Myanmar (= Burma), Thailand, Vietnam, NE India (Changlang District, Arunachal Pradesh), S China (Hainan, Chekiang, Jiangxi, Fujian, Guangdong, Guangxi, Kweichow, Sichuan, Hupeh), Taiwan. Race suriki: Taiwan. Type locality: Kuatun (= Guadun), Chongan Co., about 270 miles from Foochow, NW Fokien (= Fujian), China.