Vipera berus, known as the common European adder, inhabits a wide range of environments from woodlands to heathlands across Europe and Asia. It is recognized by its distinctive zigzag pattern along its back, varying from grey to reddish-brown. The adder is known for its mild venom and secretive, solitary behavior, often basking in sunlight to regulate its temperature.

Vipera berus, commonly known as the European adder or common viper, is native to a wide range of regions across Europe and Asia. Its geographical distribution includes northern and central Europe, extending from the United Kingdom, through Scandinavia, across northern France, Germany, and Poland, and into Russia. The range also extends southward to parts of Italy, Greece, and the Balkan Peninsula, and eastward into parts of Asia, including Kazakhstan and Mongolia.

The European adder typically inhabits a variety of habitats, including heathlands, moors, and open woodlands. It is well-adapted to temperate climates, with its habitat often characterized by cooler temperatures and high humidity. The species is commonly found in areas with dense vegetation or ground cover, which provides shelter and hunting grounds.

Vipera berus occupies the ecological niche of a terrestrial predator. It preys on small mammals, birds, lizards, and amphibians. The adder is known for its ability to thermoregulate by basking in the sun, which is crucial for its survival in cooler climates. Its cryptic coloration helps it avoid predators and remain effective as an ambush predator.