Larger groups of great and blue tits are better at solving problems than smaller ones, scientists have found. The researchers believe that this is probably because the larger the group, the more chance there is of it including a ‘bright’ or ‘experienced’ bird that can solve a particular new problem: in this case operating lever-pulling devices to receive a food reward.
Quoted from Feathered friends help wild birds innovate on ScienceDaily: Top News
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