Snakes in Andorra

Andorra has 6 snake species recorded in our database, and only 1 of them is venomous. The great majority of species are non-venomous. As a small landlocked microstate high in the eastern Pyrenees between France and Spain, Andorra has a naturally limited snake fauna shaped by altitude and a short, cool active season rather than by tropical diversity.

The country is almost entirely mountainous, with deep glacial valleys, fast streams, pine and birch forest, alpine meadows, and rocky scree slopes rising well above 2,000 meters. Snakes here track warmth and structure: sunny south-facing rock walls, dry stone terraces, woodland edges, and the milder lower valleys around the riverside towns. Cold winters drive a long hibernation, so most snake activity is concentrated in the warmer months when reptiles can bask and hunt.

The venomous snakes present belong to the European viper group, the only medically significant snakes in this part of the Pyrenees. These are stout, slow-moving ambush predators with a zigzag or barred dorsal pattern, typically found on rocky slopes, scree, and sunny clearings at mid to high elevation. They are not aggressive and rely on camouflage, biting defensively only when trodden on or handled. Andorra has no large or fast-striking venomous species.

The harmless majority covers the rest of the recorded fauna: colubrid snakes such as grass snakes and water-associated species near streams and damp meadows, along with slender, fast-moving snakes that hunt lizards and small mammals across rock and scrub. These snakes kill prey by constriction or by simply seizing it, and they pose no venom threat to people. They are a normal and valuable part of the mountain ecosystem, controlling rodent and lizard populations and in turn feeding birds of prey and other predators.

On safety, the honest picture is that nearly every snake you might meet in Andorra is harmless, and the single venomous group is shy and avoids people. The main medical concern is a bite from a European viper, which can cause pain, swelling, and other symptoms that need medical evaluation. If a bite occurs, the correct response is to seek emergency medical care promptly, where antivenom and hospital treatment are the established options. Never attempt to handle, catch, or kill a wild venomous snake, and do not rely on field first-aid measures in place of professional care. In an emergency call local emergency services, or in the United States contact Poison Control at 1-800-222-1222.