Crows are capable of using multiple tools in complex sequences, the first time such behaviour has been observed in non-humans, scientists have found. …The full original report is available here.
Seven New Caledonian crows were given the task of using three different lengths of stick to retrieve a reward — a small piece of pig’s heart. This was placed out of reach at the end of a transparent tube such that it could only be reeled in with a long stick.
Starting with a short stick, the crows had to first pull a medium stick towards them, and then in turn use that one to obtain the longest stick. [Emphasis added]
Five of the crows completed the task successfully and four of them did this on their first attempt.
Monday, August 10, 2009
But then crows can think also
From Times Online