a little bird

a little bird

An unknown person. Often used in the phrase "a little bird told me," in which the speaker does not want to reveal the source of his or her information. When I asked Carly how she knew about my new relationship, she just said that a little bird told her, but I'm going to need some specifics eventually!
See also: bird, little
References in classic literature ?
I know where Chippy is; a little bird told me," said Mrs.
It must be that, I think, that reminds me of it, especially as there was a little bird in the room that would keep on singing all the time of dinner--at least, not a little bird, for it was a parrot, and he didn't sing exactly, for he talked and swore dreadfully: but I think it must be that.
Why, she'll eat a little bird as soon as look at it
I gives her a kiss, and I says no more to her than, "My dear, you're right to speak out, you're to choose for yourself, you're as free as a little bird.