英文關鍵字
bison
buffalo
animal
mammal
prairie
outdoor
bull
male
herd
grass
nature
america
american
us
summer
landscape
grazing
north
grassland
usa
yellowstone
wild
wyoming
wildlife
endangered
mature
daylight
horn
feeding
national
park
adult
field
brown
day
environment
environmental
daytime
beast
aggression
alone
south
dakota
natural
explore
furry
fur
meadow
move
powerful