chatterer

A person who chatters; a chatterbox.

Yes, I am a chatterer, indeed, to interrupt you so often, Monsieur.

“I don't mean all of your friends—only a small proportion—which, however, connects your circle with that deadly, idle, brainless bunch—the insolent chatterers at the opera, the gorged dowagers,[…]the chlorotic squatters on huge yachts, the speed-mad fugitives from the furies of ennui, the neurotic victims of mental cirrhosus,[…]!”

Any of several passerine birds, mostly from South America; especially the cotingas.

Why is the variegated chatterer of South America also called the bell-bird?

The flight of the Chatterer bears much resemblance to that of the starling.