英文關鍵字
agkistrodon
america
animal
biological
biology
cotton
cottonmouth
dangerous
deadly
ecological
ecology
environment
environmental
fauna
fear
forest
herp
herpetology
herping
hills
illinois
midwest
moccasin
mouth
national
nature
piscivorus
poisonous
reptile
scary
serpent
shawnee
snake
southern
states
united
usa
venomous
water
wildlife
zoology