How to Identify the Persian Horned Viper (Identification Guide)
A guide to the Persian Horned Viper, a Middle Eastern desert viper marked by a distinctive horn-like scale above each eye.
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Key identifying features
The Persian Horned Viper is identified by a single, prominent, upturned spine-like scale above each eye, a broad triangular head, and a pale sandy coloration well suited to the desert terrain it inhabits across parts of the Middle East and Iran.
Coloration & pattern
The body is typically pale sandy, tan, or grayish, matching the desert substrate closely. A series of darker, often rounded or squarish blotches runs down the back, sometimes with additional smaller spots along the flanks, contributing to overall desert camouflage.
Head, eyes & scales
The head is broad and triangular, clearly distinct from the neck, with the diagnostic single horn-like scale above each eye. Body scales are keeled, and the snake often has a somewhat flattened profile suited to partial burial in loose sand.
Size & body shape
Adults typically reach 40 to 60 cm, occasionally larger, with a moderately stout body and short tail characteristic of horned desert vipers.
Range & habitat where you'll see it
Found across arid and desert regions of Iran and neighboring parts of the Middle East, favoring sandy deserts, dunes, and rocky arid terrain.
How to tell it apart from look-alikes
The single supraocular horn separates it from many hornless desert vipers and closely parallels the Arabian Horned Viper, which occupies a more southerly range on the Arabian Peninsula; precise geographic range and subtle scale differences help distinguish these closely related horned desert vipers.
Frequently asked questions
What is the defining feature of the Persian Horned Viper?
A single upturned horn-like scale above each eye, combined with pale sandy desert camouflage coloration.
How large does it grow?
Typically 40 to 60 cm in total length.
Where is this species found?
Arid and desert regions of Iran and neighboring parts of the Middle East.
How does it differ from the Arabian Horned Viper?
Primarily through geographic range and subtle scale differences, as both share a similar single-horn feature and desert camouflage pattern.