英文關鍵字
africa
african
amphibious
amphibius
animal
aquatic
big
body
clip
conservation
dangerous
ecology
environment
footage
habitat
herbivore
hippo
hippopotamus
hippos
kruger
mammal
motion
mouth
muzzle
national
natural
nature
outdoor
outdoors
park
safari
south
southern
unspoiled
video
wild
wilderness
wildlife