Take a look at this: http://typo.uni-konstanz.de/rara/nav/browse.php?number=9

The language is Toda http://en.wikipedia.org/wiki/Toda_language , I hope this helps.

On the Konstanz University site there is a project, DAS GRAMMATISCHE RARITÄTENKABINETT, "a leisurely collection to entertain and instruct". There we find an entry on the Dravidian language "Toda" with these notes:

Phenomenon | apical trills at three places of articulation (fronted alveolar, alveolar, retroflex) (see Image), both without and with palatalization

Toda has a Wikipedia entry with more information. These are the six listed trills:

• /r̘/ - plain apical alveolar trill
• /r̘ʲ/ - palatized apical alveolar tril
• /r̠/ - plain apical alveolar trill (concave, aka "retroflex")
• /r̠ʲ/ - palatized apical alveolar trill (concave, aka "retroflex")

•   `/ɽ͡r/` - plain subapical palatal trill (retroflex)
  

• /ɽ͡rʲ/ - palatized subapical palatal trill (retroflex)