adder
aggressive
ammodytes
animal
attack
basking
biology
brown
danger
dangerous
deadly
europe
european
fast
fauna
habitat
herpetology
horned
hunter
large
long
longnosed
male
nature
nose
nosed
nosehorned
phobia
poison
poisonous
portrait
predator
reptile
reptilia
serpentes
snake
species
squamata
toxic
toxin
venom
venomous
vertebrate
viper
vipera
viperidae
viperinae
wild
wildlife
zoology