why do people say "bird brain" ? Birds are smart!

Reading these stories about birds that understood what they were saying is making me re-think what I have learned about talking birds.

It's a common thing to compare a person who speaks nonsense to a bird that talks but didn't know what it is talking about. This new information changes a lot of things. For one, maybe we should be more careful about what we say in front of our talking birds. Who knows, they might be able to relay what they have heard to other birds that pass by.