The Collaborative International Dictionary of English v.0.48:

Myadestes \Myadestes\ prop. n.
   A genus of birds including the solitaires, thrushes noted for
   their beautiful songs.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

Myadestes
    n 1: solitaires [syn: Myadestes, genus Myadestes]