A screwdriver is dropped into the cages of a gorilla, a chimpanzee and an orangutan. The gorilla would ignore the object until he steps on it an hour later. The chimp, on the other hand, would use it as a spear, hammer, probe, mille, toothpick and just about anything else other than a screwdriver. Orangutan would notice it, but ignore it so that the zookeeper would not notice his own error. If the keeper did notice, then the orangut would rush over, grab the tool and relinquish it only when given food.”]
Source: https://gizmodo.com/orangutan-hacks-snack-machine-5486677