Ashy-headed Goose
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Chloephaga poliocephala
Found in Argentina and Chile.
Adults's heads and necks are gray, their upper back and breast chestnut with fine barring, their flanks barred black and white, and their belly white.
In flight their blackish wings show bold white leading and trailing patches and a metallic green speculum.
Their bill is black and the legs and feet orange with black markings.
Juveniles' rufous areas are much duller, their back and breast barring stronger, and their speculum dark brownish.
There are 2 different calls: Males make "soft, wigeon-like whistles" and females "harsh cackling notes".