In an interesting study in Oxford University it has been found that New Caledonian crows can use upto 3 tools in correct sequence to achieve a goal or to solve any problem. It it a quality that has never been observed in any animal before.
This study shows that these birds have cognitive ability of planning and analogical reasoning which was never examined before to such level.
In normal situations these crows use a range of tools to extract prey from holes. In the experiment the crow under observation was found to be able to inventing new tool designs that are needed to complete the task.
In the experiment scientist observed 7 crows out of which 5 were able to complete the task in their very fist effort, while remaining four did it after trails.
