英文關鍵字
agkistrodon
america
american
animal
black
camouflage
colours
danger
dangerous
deadly
detail
eye
fauna
habitat
head
horizontal
lethal
mexican
mexico
moccasin
nature
nobody
orange
poison
poisonous
predator
rattlesnake
reptile
scale
sibling
snake
tongue
toxic
venom
venomous
vertebrate
viper
wild
wildlife