africa
african
aggression
aggressive
aggressive animal
aggressiveness
amphibius
animal
behavior
danger
dangerous
determination
dominance
endangered species
fight
fighting
hippo
hippopotamus
hippos
horizontal
huge
lake
large
mammal
mouth
nature
nature reserve
open
outdoor
park
portrait
river
safari
skin
south
southern
southern africa
teeth
tooth
tough
tourism
two
unspoiled
water
white
wide
wild
wild animal
wilderness
wildlife