Tiger Keelback

The dorsal color pattern of R. tigrinus is olive-drab green, with black and bright orange crossbars or spots from the neck down the first third of the body. The belly is whitish. The average total length (including tail) is usually 60–100 cm (24–39 in).

R. tigrinus is found in eastern Russia (Primorskiy and Khabarovsk territories), North and South Korea, China (widespread, except in the western third and the extreme south; Zhejiang, Fujian, Jiangxi, Hubei, Guizhou, Sichuan, Gansu, Shaanxi and Inner Mongolia), on the island of Taiwan, in Vietnam and in Japan (Yakushima, Tanegashima, Kyūshū, Shikoku, Honshu, Osaka and in the Ryukyu Islands). The type locality given is "Japan".

The diet of R. tigrinus consists mainly of small vertebrates, especially frogs and toads. It forages using both chemical (smell/tongue) and visual cues to find its prey. Rhabdophis tigrinus has specialized nuchal glands on the back of the neck that are used to store cardiotonic steroids (bufadienolides) sequestered from the toads in their diet. Rhabdophis tigrinus are resistant to the toxic effects of these chemicals. This is different from their venom, which is produced in oral glands and is not known to contain bufadienolides or other sequestered toxins. Female Rhabdophis tigrinus can pass sequestered chemicals to their offspring, both by deposition in egg yolk and by transfer across the egg membranes within the oviduct, late in gestation.