Cannibalism is shown. They kill a woman and fill her corpse with stones to barbecue her.
A native is tortured by other natives. They cut his hand and put flesh eating ants on it. Later his hand is shown being eaten to the bones.
A crocodile is being gutted alive. Its body is cut and and its stomach is pulled out.
A snake gets killed with an axe, and a tied up bat is shown getting killed by a snake.
A native woman gives birth by a river and throws her baby to the crocodiles.
A native girl gets killed, decapitated, gutted, cooked, and eaten by the cannibals.
Robert kills a cannibal and bites his liver in front of other cannibals to scare them.
Extreme violence, including authentic animal killings. Not as violent as the same directors Cannibal Holocaust, but almost.