Trivia.com
Ravens have been seen working with wolves, calling them to the site of dead animals to open a carcass, leaving the scraps more accessible to themselves.
Trivia.com
Ravens have been trained to clean a French theme park by picking up cigarette butts in return for a treat
Trivia.com
Ravens and wolves have formed a mutually beneficial relationship where ravens call wolves to the site of dead animals so that the wolves then open up the carcass and leave scraps for the ravens
See also
.com