英文關鍵字
america
american
animal
big
biology
bison
brute
buffalo
creature
critter
custer
dakota
eat
ecology
environment
fauna
feed
furry
graze
hairy
large
life
loop
male
mammal
mammalogy
mammals
natural
nature
organism
outdoors
park
place
south
species
state
travel
ungulate
usa
walk
wild
wildlife