Chatterer \Chat"ter*er\, n.

1. A prater; an idle talker.

2. (Zo["o]l.) A bird of the family Ampelid[ae] -- so called from its monotonous note. The Bohemion chatterer (Ampelis garrulus) inhabits the arctic regions of both continents. In America the cedar bird is a more common species. See Bohemian chatterer, and Cedar bird.

Source: Webster's Revised Unabridged Dictionary (1913)