The Collaborative International Dictionary of English v.0.48:

Chlorura \Chlorura\ n.
   one of the genera of birds which comprise the towhees.

   Syn: genus Chlorura.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Chlorura
    n 1: towhees [syn: Chlorura, genus Chlorura]