babbler

noun3

1. •
   Someone who babbles.

   • Great babblers, or talkers, are[…] not fit […]for trust. — 1692
2. •
   (old-fashioned) A hound who is too noisy on finding a good scent.
3. •
   Any of several passerine birds, of the families Leiothrichidae, Timaliidae and Paradoxornithidae (found in Asia and Africa), and Pomatostomidae (found in Australia).