adder
animal
beautiful
berus
brown
closeup
cold
common
creeping
crossed
danger
dangerous
deadly
detail
endangered
environment
eurasian
european
fauna
fear
fearsome
female
frightening
full
habitat
herpetology
length
macro
natural
nature
poikilothermic
poison
poisonous
reptile
scales
scary
snake
toxic
venom
venomous
viper
vipera
viperidae
viperinae
wild
wildanimal
wildlife