Japanese Striped Snake

The Japanese striped snake (Elaphe quadrivirgata) is a colubrid found throughout the Japanese archipelago except the Ryukyus. It measures 80-200 cm and is usually pale yellow with four black longitudinal stripes, though unstriped animals occur. The iris is red and the pupil a vertical ellipse. There are 19 rows of dorsal scales at midbody and 193-210 ventrals. Its scales are large relative to its slender body and its skin is not very elastic, so it cannot swallow very large prey. Juveniles are pale yellow with indistinct or absent stripes and reddish-brown crossbars. Melanistic animals, called karasu-hebi in Japan, are black down to the iris. The population on Tadanae-jima in the Izu Islands grows large, reaching 2 m on a diet of nothing but seabird eggs and chicks, while Hokkaido animals stay under 80 cm. Its diet is broad, and it is comparatively strongly ophiophagous for a Japanese snake, cannibalism included. It is chiefly diurnal and threatens by vibrating its tail rapidly against the ground. It mates in April and May and lays 4-15 eggs in July and August, with males performing a combat dance in the breeding season.

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The Japanese Striped Snake lives 15-20 years.

The Japanese Striped Snake grows to 80-200cm total length; animals from Hokkaido stay under 80cm while those on Tadanae-jima in the Izu Islands reach 2m.