Anas penelope

Gallardo, J. C., V. Macías, and E. Velarde. 2009. Birds (Vertebrata: Aves) of the Gulf of Mexico, Pp. 1321–1342 in Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas.

Harte Research Institute for Gulf of Mexico Studies. 2016. GulfBase: Resource Database for Gulf of Mexico Research, Education, and Management. Texas A&M University-Corpus Christi. World Wide Web electronic publication. http://www.gulfbase.org, 05-03-2024.