Bluefinch
A Bluefinch is a talking bird in the Great Orchard who tells Button-Bright the peach he ate was enchanted by Ugu the Shoemaker.
First named in The Lost Princess of Oz, ch. 11
he looked up and saw a Bluefinch fly down from the sky and alight upon a branch just before him.
What the books say it is
eyes bright 1 chapter
First it looked with one bright eye and then turned its head and looked at him with the other eye.
The Lost Princess of Oz, ch. 11