How to Identify Field's Horned Viper (Identification Guide)

Key identifying features

Field's horned viper (Pseudocerastes fieldi) is a small desert viper best recognized by a single elongated, spike-like horn scale above each eye, a flattened triangular head, and pale sandy coloring that blends closely with desert substrate.

Coloration & pattern

Ground color is typically pale sandy, tan, or grayish-buff, closely matching the desert soils it inhabits. Faint dusky blotches or crossbands are usually present along the back, though they can be subtle against the pale background, and the overall look is one of muted, low-contrast camouflage rather than bold markings.

Head, eyes & scales

The head is broad, flattened, and triangular, with the single most distinctive feature being a prominent, elongated horn-like scale projecting above each eye. Pupils are vertical, and the head and body scales are keeled, contributing to the rough, sand-colored texture that aids concealment in loose desert substrate.

Size & body shape

This is a relatively small viper, with adults typically reaching 50-80 cm. The body is moderately stout but less massive than large blunt-nosed vipers, tapering to a short tail, consistent with an ambush predator adapted to blending into open desert terrain.

Range & habitat where you'll see it

Field's horned viper occurs in desert and semi-desert regions of the Middle East, including parts of Israel, Jordan, Saudi Arabia, Iraq, and Syria. It favors sandy and gravelly desert flats, wadis, and rocky desert margins, often lying partially buried in loose sand awaiting prey.

How to tell it apart from look-alikes

The paired supraocular horns are the clearest way to separate Field's horned viper from other desert vipers, including the desert horned viper, which has a single spike above each eye of somewhat different shape and occupies overlapping but distinguishable ranges; careful attention to horn shape and locality helps distinguish the two. It differs from the saw-scaled viper by lacking the serrated body-scale friction ridges along the flanks. Non-venomous desert snakes typically lack any horn-like scales above the eyes and have rounder pupils and smoother scales, making the combination of eye horns and vertical pupils a reliable identifying feature.