Earlier, Oxford University researchers watched a New Caledonian crow named Betty make hooks from garden wire and adapt the shape of the hook to suit a particular job ​ — a task that primates have never been known to perform.
Varem on Oxfordi ülikooli teadlased jälginud, kuidas uus - kaledoonia vares Betty teeb aiatraadist konkse ja mugandab konksu kuju vastavalt otstarbele – ei teata, et primaadid oleksid kunagi midagi niisugust teinud.