The smartest predator on earth other than mankind is the coyote. After the end of the world, there will be two kinds of creatures still alive. Coyotes and cockroaches.
Without a doubt, this guy " It is my personal belief that when the last human has fallen, and the last skull lies on the irradiated earth, a coyote will come trotting out of some safe place. Don't ask me where he'll come from; but I believe that he will survive as he has always survived. The coyote will trot in his furtive, skulking manner, to the skull. He will approach it carefully with the caution borne of millennia of avoiding steel traps and snares and pitfalls. He will cautiously sniff it. His educated nose will tell him that he no longer has anything to fear from this bleached remnant of a once great civilization. Taking a few short steps to get in the exact position, he will lift his leg." Charles Cadieux