Mexican species

       
Greater Scaup (Aythya marila)
Mexico The Mexican Republic Aguascalientes Baja California Guadalupe Baja California Sur Campeche Chiapas Chihuahua Coahuila Colima Revillagigedos Revillagigedos Ciudad de México Durango Guanajuato Guerrero Hidalgo Jalisco México Michoacán Morelos Nayarit Tres Marías Nuevo León Oaxaca Puebla Querétaro Quintana Roo Cozumel San Luis Potosí Sinaloa Sonora Tabasco Tamaulipas Tlaxcala Veracruz Yucatán Zacatecas
Subspecies Hide subspecies
marila Breeds subarctic from Iceland and Scandinavia eastward to Lena River (north-central Siberia); winters to coasts of northwestern and east-central Europe (eastern North Atlantic), and Black and Caspian seas
nearctica Breeds from Lena River (north-central Siberia) eastward to Kamchatka and the Commander Islands; Alaska eastward to northern Quebec; winters Japan and Korean Peninsula to eastern China and Taiwan, central California, Great Lakes, and Atlantic coast south to North Carolina
Endemic status
Sound Guide
Comment In winter plumage the female shows pronounced silver gray vermiculation to the back, which at first glance could make it look like a young male starting to acquire the gray back. But the white face patch of the female will probably always be so well-marked that doubts about sex should be excluded.
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