chatterer

noun2

1. •
   A person who chatters; a chatterbox.

   • Yes, I am a chatterer, indeed, to interrupt you so often, Monsieur. — 1845
2. •
   (old-fashioned) 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? — 1832