The results are published in the Royal Society journal Proceedings B.
The researchers are interested in what they call "technical intelligence", which is essentially animals' ability to use objects to solve problems.
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Dr Alice Auersperg University of OxfordIt confirms how innovative and how adaptable this species is to novel problems”
Figaro also worked out how to make his "fishing sticks" by stripping long, thin pieces off a wooden block in his enclosure.
"So we had one innovator, and a very important aspect of innovation [is] how it can spread in a group," Dr Auersperg explained to BBC News.
To investigate this, the researchers set up an experiment where six birds were shown, by Figaro, how to strip a block and fish for a nut.
After watching the demonstration, most of the birds were able successfully to make their own strip of wood, and use it to retrieve a piece of food.
Fishing technique "This was the interesting thing," said Dr Auersperg "They were successful and interacting with the materials, but they weren't copying Figaro - they devised their own strategy of obtaining the reward."
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