Spotted hyenas solved a two-rope cooperation task rapidly without being coached on the social rule, but solo familiarisation and task ecology make the chimpanzee comparison more specific than a general intelligence ranking.
In a Duke University experiment, spotted hyenas were given a rope-pulling task requiring two animals to coordinate without prior training — they solved it remarkably quickly, outperforming chimpanzees in comparable cooperation experiments where the primates often needed extensive training.
Natural History