07/25/2026
This week we're going to feature the European Adder! This beautiful little snake is native to Britain and northern Scandanavia east to northern Greece to the Sakhalin Islands in Russia. As long as there is space to accommodate, the European Adder is a bit of a habitat generalist. Habitat has to include space for hibernation, sun for basking but cover to hide from predators, and adequate foraging space. The diet for European Adders varies a bit based on locality and prey availability but mostly consisting of small mammals, amphibians, and nestling birds. This pretty snake will slowly stalk their prey, strike, and then track them using molecules present in their venom. European Adders do go through a hibernation period then look for a mate relatively soon after emerging. Feeding usually occurs in a selected spot up to 2 km away from the hibernacula and they do not usually feed until after mating occurs. During mating, males follow the females scent trail sometimes hundreds of meters a day and the pair will usually stay together for 1-2 days after mating! Babies are born in late July to mid August with roughly 5-10 babies in a litter. Depending on their range, European Adders are active at different times of day. The northern range snakes are typically diurnal and southern range snakes are typically crepuscular or nocturnal. A bite from a European Adder is getting more common because of the rapid rate of human expansion. So if you find yourself hiking in their native range, make sure you look down! Because it is protected in some of the countries the European Adder calls home, populations are doing ok. While they are rare in North American collections, they are well represented in Europe so support their conservation and research by donating or visiting when you can!