Robbins, M. B., Braun, Michael J., Milensky, Christopher M., Schmidt, Brian K., Prince, W., Rice, N. H., Finch, D. W., and O'Shea, B. J. 2007. "Avifauna of the Upper Essequibo River and Acary Mountains, Southern Guyana." Ornitologia Neotropical, 18, (3) 339–368.