Characteristics: The common adder is a small true viper that has a short temper and often strikes without hesitation. Its venom is hemotoxic, destroying blood cells and causing tissue damage. Most injuries occur to campers, hikers, and field workers.
Habitat: Common adders are found in a variety of habitats, from grassy fields to rocky slopes, and on farms and cultivated lands.
Length: Average 45 centimeters (18 inches), maximum 60 centimeters (24 inches).
Distribution: Very common throughout most of Europe; northern Morocco.