How to Identify Lataste's Viper (Identification Guide)

Key identifying features

Lataste's viper (Vipera latastei) is identified by a small, distinct, upturned scaly projection on the snout tip, a stocky body, and a bold pattern of dark blotches or a zigzag against a paler background, distinguishing it from other snakes across the Iberian Peninsula and northwest Africa.

Coloration & pattern

Ground color ranges from gray and tan to light brown or pinkish-brown. A dark brown to black zigzag or a series of connected diamond-shaped blotches runs along the spine, often with strong contrast against the paler background. Dark spots frequently line the flanks below the main dorsal pattern, and a dark line or triangular mark is often visible behind each eye.

Head, eyes & scales

The head is broad and triangular, clearly wider than the neck, and topped with small irregular scales. The most distinctive feature is the small, upturned, horn-like scale at the tip of the snout — smaller than that of the nose-horned viper but larger and more obvious than the subtle upturn seen in the asp viper. Pupils are vertical, and body scales are strongly keeled.

Size & body shape

Adults typically reach 45-65 cm, occasionally up to 75 cm, with a thick, stocky body and short tail typical of true vipers. Females are generally larger and heavier-bodied than males.

Range & habitat where you'll see it

This species is found across the Iberian Peninsula (Spain and Portugal) and in parts of northwestern Africa, including Morocco and Algeria. It inhabits dry, rocky scrubland, open pine and oak woodland, stony hillsides, and Mediterranean maquis, often in areas with abundant sun exposure and loose rock or scrub cover.

How to tell it apart from look-alikes

The upturned nasal scale readily separates Lataste's viper from the asp viper, which shares part of its range but has only a very subtle snout upturn, and from the common adder, which has no upturn at all. It differs from the nose-horned viper mainly by geography, since their ranges do not overlap. Non-venomous Iberian snakes such as horseshoe whip snakes or ladder snakes have round pupils, slender bodies, and smooth scales, clearly distinguishing them from this stocky, vertical-pupiled, keeled-scale viper.