Anas obscura var. fulvigula
St John’s River, Florida.
Hitherto included within A. platyrhynchos. Close relationship between forms fulvigula and diazi apparent in morphology and established by molecular analysis#R. Both taxa differ from A. platyrhynchos on account of male appearing like female (4); white line on lower edge of speculum narrower or non-existent (1); upperwing-coverts dark-mottled brown, continuous with back vs plain grey in male and dark-mottled brownish-grey in female platyrhynchos (ns); speculum green-blue vs purple-blue (2). Differences between diazi and fulvigula are not marked: fulvigula has plainer, buffier face with less dark crown (2), an obvious black spot at base of mandible vs barely discernible black spot (1), no or vestigial white borders to speculum (1), and weaker yellow bill (ns). Three subspecies recognized.
Food and feeding
Status and conservation
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