Monolopy on coconuts
Pinocchio knows his way with the coconuts on the island. First he moves the coconut to the harbour by carefully throwing and rolling it in that direction. Rhesus monkeys usually walk on all fours so he cannot easily hold the coconut. Once the coconut is in the harbour Pinocchio picks out a cement dock, which is the flattest and hardest surface on the island. Then he throws the coconut up in the air. By standing on his hind legs, moving his arms upward and jumping a little, the coconut reaches quite high. Then it falls down hard onto the cement. Pinocchio repeats this until the coconut cracks. This invention seems to be unique, since no other monkey on the island uses the trick. The complexity of it makes it unlikely that other monkeys will imitate it. Pinocchio is therefore the only rhesus monkey that has coconut on the menu.
According to the researchers the trick is specific and functional. This may explain why the other monkeys have not yet succeeded in imitating it. This suggests that certain behaviours can only be transferred under very specific circumstances. The researchers do not know yet what these circumstances are.
The rhesus monkey in the picture is not Pinocchio.