The Tiger keelback is a venomous snake native to East Asia and Southeast Asia. Its dorsal color pattern 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.
Tiger keelbacks are found in eastern Russia (Primorskiy and Khabarovsk), North and South Korea, China, on the island of Taiwan, in Vietnam, and in Japan. They occur in mixed and deciduous forests, flooded terrain, ponds, and other water bodies.
Tiger keelbacks lead a solitary life and rarely venture far from water. They are active during the day spending most of the time searching for prey which they detect using both chemical (smell/tongue) and visual cues. When sensing danger they take the characteristic threat posture, which is accompanied by an almost vertically raised flattened front third of the body, hissing and striking towards the enemy. Keelback snakes have glands in their neck that secrete poison they ingest from eating poisonous toads. These glands secrete a caustic secretion that scares away predators. Saliva and secretion of the upper labial glands in contact with the wound can cause severe poisoning.
Tiger keelbacks are oviparous snakes. Between late July and August females lay 18-22 eggs. The young usually appear at the end of August-September measuring about 15-17 cm (5.9-6.7 in). They grow quickly and become reproductively mature at 1.5 years of age.