Japanese Striped Snake

Fascinating facts about the Japanese Striped Snake

• Four sleek black lines run down its back, giving the species its name, yet some individuals turn entirely jet-black, known locally as karasu-hebi, reminding us that even a single species can sport dramatically different wardrobes.
• Born with a bright reddish hue and crosswise stripes that mimic venomous snakes, juveniles shed these warning colors as they grow, illustrating nature’s clever use of mimicry for early-life protection.
• Active by day and feeding on frogs, lizards, insects, rodents, birds and their eggs, this diurnal hunter showcases a versatile menu that keeps it thriving in every corner of Japan except the Ryukyu Islands.

At a glance

About the Japanese Striped Snake

Elaphe quadrivirgata, the Japanese four-lined ratsnake, typically reaches 1 to 1.5 m in length. Its ground colour is yellow or light brown and it has four black lengthwise stripes; an all-black form known as karasu-hebi also occurs. Juveniles are reddish and have crosswise stripes and a spotted pattern. The dorsal scales are weakly keeled in adults and are arranged in 19 rows; the ventrals number 193–210, the anal scale is usually divided, and the subcaudals are divided, numbering 70–96. The species is active and diurnal. It feeds on frogs, lizards, insects, rodents, birds and their eggs. It is found throughout Japan except the Ryukyu Islands.

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