Which animal never forgets mistreatment and waits for the right moment to retaliate?

Is it Scorpio?|||many animals including chimps, elephants, killer whales and dolphins will do this. Basically all intelligent animals, including (sigh( humans.|||Scorpio would be the astrology sign for the Scorpion. I don't know if the animal itself acts in that manner or not, but I am a Scorpio and that sure would describe the way I think in such matters.|||Do you mean animal or zodiac sign? I know nothing of astrology, but a mule will never forget mistreatment, and has been known to kill people with a single kick to the kidneys when he found his right moment for retaliation.|||an elephant|||I heard cats and pit bulls|||Republicans