Red-breasted merganser - Wikipedia - Red breasted merganser
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The red-breasted merganser is a diving duck, one of the sawbills. The genus name is a Latin word used by Pliny and other Roman authors to refer to an unspecified waterbird, and serrator is a sawyer from Latin serra, "saw". The Red-breasted Merganser is a shaggy-headed diving duck also known as the "sawbill"; named for its thin bill with tiny serrations on it that it uses to keep hold.