Snakes in Norway

Norway has 6 snake species recorded in our database, only 1 of which is venomous. As a cool northern country reaching well above the Arctic Circle, Norway sits at the climatic limit for reptiles, so its snake fauna is small and the great majority of species are non-venomous. Snakes are concentrated in the milder south and along the coast, with diversity thinning out as you move north and to higher elevations.

Geography shapes this fauna more than anything else. Norway is a land of long winters, mountains, fjords, forests, and bogs, and snakes here depend on warmth that is in short supply. They favor sun-exposed slopes, forest edges, heathland, rocky outcrops, stone walls, and the margins of lakes and wetlands where they can bask and find prey. Because the active season is brief, Norwegian snakes spend long periods in hibernation and rely on careful use of warm microhabitats to survive and reproduce.

Only one venomous snake is present in Norway: the European adder, a member of the viper family. It is the country's sole venomous species and also its most northerly distributed snake, found across much of the mainland. The adder is generally shy and bites only defensively, usually when stepped on or handled. Its venom is medically significant but rarely fatal with proper care, and a bite is a medical emergency rather than a routine event.

The harmless majority includes non-venomous species such as the grass snake, an excellent swimmer often associated with water and wetlands, and the smooth snake, a secretive constrictor of dry, sunny habitats. Several of the species in the database are likely rare, peripheral, or recorded only at the edges of their range in southern Norway. These snakes pose no venom threat to people and are a normal, valuable part of the landscape.

Snakes play an important ecological role in Norway by controlling populations of rodents, amphibians, and other small animals, and by serving as prey for birds and mammals. Most species you might encounter are harmless, and the European adder is the one species of medical concern. If a bite occurs, the correct response is professional medical care, where antivenom and hospital treatment are the established options. Never attempt to handle a wild venomous snake, and never rely on improvised first aid. In an emergency, contact local emergency services, or in the United States contact Poison Control at 1-800-222-1222.