López, Ricardo, Eduardo A. Ventosa, Katsí R. Ramos et.al. 2006. Reduction in host use suggests host specificity in individual shiny cowbirds (Molothrus bonariensis). Ornitología Neotropical 17, 259-269.
National Audubon Society. Christmas Bird Counts. Fajardo Census 1994-2007.
Post, William and James W. Wiley. Reproductive interactions of the shiny cowbird and the yellow-shouldered blackbird. The Condor 79: 176-184, 1977.
Ventosa, Eduardo A., María Camacho Rodríguez, Chabert Llompart, José L. et.al. 2005. Puerto Rico Critical Wildlife Areas. Department of Natural and Enviromental Resources.
