Its period of hibernation is from October until March/April either alone or in the company of other snakes, in a hole or beneath a pile of rocks. It is also incredibly resistant to cold surviving temperatures of minus 15 C.
Coupling takes place in march/April, followed by the laying of between 5 and 15 (sometimes 20) eggs in July in moist soil or an abandoned hole in the ground. After 4 to 6 weeks the young hatch out.
The Couleuvre vipérine is the smallest of the couleuvres to be found in France and rarely exceeds 60 or 70 cm’s. It is frequently mistaken to be one of the different adders to be found in France, hence its name from the French "Vipére". Its head is clearly distinct from its body, wider with flat top and sides, rather pointed nose, eyes with round pupils! At the back of its head are two lines, which can be clearly seen, in the form of a "V" the open part of the "V" at the rear. Its colouring is extremely variable, olive greens, greenish brown, yellowish brown, greys, yellowish orange and reddish browns. On its back are two rows of dark lines, angled backwards, which are often joined together to give a zigzag pattern.
Population: In decline
Couleuvre vipérine (Syn. Française Vipère d'eau)