Vipera berus
Vipera berus
''Vipera berus'', the common European adder or common European viper, is a venomous viper species that is extremely widespread and can be found throughout most of Western Europe and all the way to Far East Asia. Known by a host of common names including ''Common adder'' and ''Common viper'', adders have been the subject of much folklore in Britain and other European countries. They are not regarded as highly dangerous; the snake is not aggressive and usually only bites when alarmed or disturbed. Bites can be very painful, but are seldom fatal. The specific name, ''berus'', is New Latin and was at one time used to refer to a snake, possibly the grass snake, ''Natrix natrix''.
The common adder is found in different terrains, habitat complexity being essential for different aspects of its behaviour. It feeds on small mammals, birds, lizards, amphibians and in some cases on spiders, worms and insects. Females breed once every two or three years with litters usually born in late summer to early autumn in the Northern hemisphere. The common adder, like most other vipers, is ovoviviparous; litters range in size from 3 to 20 with young staying with their mothers for a few days. Adults grow to a length of 60 to 90 centimetres and a mass of 50 grams to about 180 grams . Three subspecies are recognized, including the nominate subspecies described here. The snake is not considered to be threatened though it is protected in some countries.
The common adder is found in different terrains, habitat complexity being essential for different aspects of its behaviour. It feeds on small mammals, birds, lizards, amphibians and in some cases on spiders, worms and insects. Females breed once every two or three years with litters usually born in late summer to early autumn in the Northern hemisphere. The common adder, like most other vipers, is ovoviviparous; litters range in size from 3 to 20 with young staying with their mothers for a few days. Adults grow to a length of 60 to 90 centimetres and a mass of 50 grams to about 180 grams . Three subspecies are recognized, including the nominate subspecies described here. The snake is not considered to be threatened though it is protected in some countries.
