Elephants are known for their excellent memories. If a member of their herd is harmed or killed by humans, they may attack poachers or villages.

Highly intelligent primates, chimpanzees can hold grudges and exhibit aggressive behavior towards those who have wronged them in the past.

Dolphins can be aggressive sometimes. They have been documented bullying or even killing sharks, which some believe may be revenge for past injuries by sharks.

These intelligent birds can recognise faces. If they feel threatened or harassed by a human, they may remember that person and target them with attacks.

Camels can be stubborn. If they are mistreated, they may become aggressive and attempt to bite or kick their handlers.

While not documented extensively, some anecdotal evidence suggests that whales may remember and retaliate against boats that have collided with them.

These large lizards have a good sense of smell. If they are injured by a human or animal, they may track down the attacker and attempt to finish them off.

While not exactly seeking revenge, some species of scorpions can exhibit a "sting dance" when threatened, repeatedly stinging the ground or object they perceive as a danger.