
More evidence today that humans are not the only species with the intelligence and cognitive abilities to make and use tools.
We now know that several other species have the cognitive ability to make tools and at least one, the Caledonian Crow, goes one step further and not only makes simple modifications like stripping leaves from a twig but actually shapes the tool precisely, designing a tool fit for purpose.
We have known since 2002 that captive Caledonian crows such as the famous 'Betty' will bend wire into a hook to retrieve food. Wire is of course not a natural substance yet these crows appear to understand not only the shape and dimensions of the hook they need, but they also understand the tensile and maleability qualities of the wire they use. Because they were captive crows however it was always a possibility that there had been an element of training involved, even inadvertently.