英文關鍵字
adder
alive
animal
asp
aspis
aspisadder
attacks
beautiful
beauty
big
black
brown
close
color
dangerous
endangered
eye
female
focus
forest
head
herpetology
hisses
living
marsh
nature
poison
poisonous
predator
reptile
sand
scales
serpentes
shiny
siberian
skin
snake
species
swells
taiga
tail
threatens
toxicity
twists
venom
venomous
viper
vipera
wild
wildlife