The Várzea thrush (Turdus sanchezorum) is a resident breeding bird in the western Amazon. It is a cryptic species identified through molecular analysis of museum specimens. It was formerly considered conspecific with Hauxwell's thrush.
O'Neill . J. P. . Lane . D. F. . Naka . L. N. . A Cryptic New Species of Thrush (Turdidae: Turdus) from Western Amazonia . The Condor . 2011 . 113 . 4 . 869–880 . 10.1525/cond.2011.100244. 86624442 . https://web.archive.org/web/20120426051312/http://cdc.lamolina.edu.pe/Noticias/Documentos/Condor2011_ONeill_etal.pdf . 2012-04-26 .