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Aythya collaris
A compact diving duck with a distinctive head shape—a sloping forehead and peaked rear crown. The crown flattens when they are diving. In flight, Ring-necked Males are bold black-and-gray with a dark head, black back, and gray sides with a white hash mark on the chest. Females are rich brown with a contrastingly pale cheek, a white patch near the bill, and a whitish eyering. Adult males have a prominent white ring on the bill.
On a large urban pond with several other types of ducks
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