The Seoane's viper (Vipera seoanei) is a venomous viper species. It was named in honor of Spanish naturalist Víctor López Seoane y Pardo-Montenegro.
The Seoane's viper is a highly polymorphic species for which four main color-pattern types have been described: well-developed, brown zigzag pattern down the back, set against a beige or light-gray ground color; roughly twin-striped pattern, with the ground color expressed as two narrow, straight, dorsolateral longitudinal lines along the body; uniform brownish morph with no pattern; fragmented zigzag pattern.
These snakes are found in extreme southwestern France and the northern regions of Spain and Portugal. They live in mountainous areas and inhabit the edges of woodlands, scrubland, grasslands, and cultivated areas.
Seoane's vipers are solitary and spend time on their own. They are mainly diurnal but can also be active on warm evenings. They are ambush predators and hibernate between November and March.
These snakes are carnivores. They prey on small rodents, lizards, and small birds. Juveniles eat mainly lizards.
Female Seoane's vipers are known to give birth to 3-10 young between late August and early September. Depending on weather conditions they can give birth every year or every two years.
The main threats to Seoane's vipers include habitat loss and persecution.
The IUCN Red List and other sources don’t provide the number of the Seoane's viper total population size. Currently, this species is classified as Least Concern (LC) on the IUCN Red List.
