adder
aggressive
animal
attack
beautiful
berus
close up
closeup
cold
coldblooded
color
common
crossed
danger
dangerous
endangered
european
fauna
fearsome
female
head
herp
herpetology
image
nature
poison
poisonous
portrait
position
predator
ready to bite
ready to strike
reptile
scales
serpent
skin
snake
species
strike
toxic
venom
venomous
viper
vipera
viperidae
viperinae
wild
wildlife
zoology