A study of great tits has shown that the birds learn to avoid toxic or unappetizing prey by observing other great tits recoiling while eating such prey. The ability to learn bad food choices is an example of social transmission.

See the source article by following the link below:
A study of great tits has shown that the birds learn to avoid toxic or unappetizing prey by observing other great tits recoiling while eating such prey. The ability to learn bad food choices is an example of social transmission.