adder
angis
animalia
basking
berus
chordata
coldadapted
common adder
common european adder
common european viper
common viper
cross adder
devil
european adder
european common viper
european viper
folklore not dangerous
foraging
hibernates
hibernation
in middle english
lizards
mainly diurnal
meaning
melanistic
mild toxicity
mild venom
nominate subspecies
northern viper
not very dangerous
ovoviviparous
serpent
snake
strike
terrestrial
thickbodied
v berus
venomous viper species
vertebrata
vipera
vipera berus
viperidae
viperinae
widespread
zigzag
zigzag pattern