How to Identify the Tokara Habu (Identification Guide)
The Tokara habu is a pit viper endemic to the Tokara Islands of Japan, recognized by its brown to olive body marked with dark, irregular blotches and its restriction to a small chain of subtropical islands.
Read the full Tokara Habu encyclopedia entry →Key identifying features
The Tokara habu (Protobothrops tokarensis) is a pit viper found only in the Tokara Islands of Japan, identified by its patterned brown or olive body with darker, irregular blotches, along with the broad triangular head and heat-sensing facial pits characteristic of pit vipers. Its extremely limited island range is itself a strong identifying clue.
Coloration & pattern
The base coloration ranges from brown to olive or grayish-tan, patterned with a series of darker, irregular blotches or partial crossbands running down the back, often appearing somewhat mottled rather than in crisp, uniform bands. This coloration provides camouflage against leaf litter and forest floor debris typical of its subtropical island habitat.
Head, eyes & scales
The head is broad, triangular, and clearly distinct from the neck, with a heat-sensing pit located between the eye and nostril on each side. Pupils are vertically elliptical. Body scales are keeled, giving the skin a rough, non-glossy texture.
Size & body shape
The Tokara habu is a moderately sized pit viper, generally similar in proportion to other regional habu species, with a moderately stout body and a shorter tail typical of vipers, tapering less dramatically than in slender, fast-moving colubrid snakes.
Range & habitat where you'll see it
This species is endemic to the Tokara Islands, a small island chain in southern Japan between Kyushu and the Amami Islands. It inhabits subtropical forest, scrub, and rocky terrain typical of these small volcanic islands, and its distribution does not extend to neighboring island groups.
How to tell it apart from look-alikes
The Tokara habu's defining identification feature is its restriction to the Tokara Islands, distinguishing it geographically from closely related habu species found on other Ryukyu islands, such as the Okinawan habu or Sakishima habu, which occupy separate, non-overlapping ranges. Subtle differences in blotch pattern and body tone also help separate these closely related species, but locality remains the most reliable single distinguishing factor given their similar overall body plan.
Frequently asked questions
Where is the Tokara habu found?
It is endemic to the Tokara Islands, a small chain in southern Japan between Kyushu and the Amami Islands.
What does the Tokara habu look like?
It has a brown to olive body marked with darker, irregular blotches, along with the broad triangular head typical of pit vipers.
How can you distinguish the Tokara habu from other habu species?
Its restriction to the Tokara Islands, which do not overlap with the ranges of other habu species, is the most reliable identifying factor, along with subtle pattern differences.
What habitat does the Tokara habu occupy?
It lives in subtropical forest, scrub, and rocky terrain typical of the small volcanic Tokara Islands.
Does the Tokara habu have heat-sensing pits?
Yes, like all pit vipers it has a heat-sensing pit between each eye and nostril.