Um passarinho me contou = I heard it through/on the grapevine

I heard on the grapevine that our neighbours were expecting a baby.
(Um passarinho me contou que nossos vizinhos estavam esperando um bebê.)
I heard through the grapevine that Mary was pregnant.
I heard through the grapevine that Mary was pregnant.
(Um passarinho me contou que Mary estava grávida.)