To understand how learning plays out as birds age, the scientists also tested 21 juvenile birds in the groups at 100 days after leaving the nest, and again at 200 and 300 days.

While the youngest birds didn't exhibit any difference in their results, a pattern started to emerge at 200 days.

"This suggests the social environment has an effect on cognitive development," Dr Ashton said.

"It's not purely a genetic thing, there must be some kind of environmental factor at play."

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