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A MALE MERGANSER enjoys a sunny day in the Abagadasset River in Bowdoinham Sunday. Mergansers are mainly a freshwater duck species that will sometimes winter in a saltwater estuary, according to The Cornell Lab of Ornithology. Also known as sawbills, fish ducks, or goosanders, mergansers most often net in tree cavities, according to Cornell.
A MALE MERGANSER enjoys a sunny day in the Abagadasset River in Bowdoinham Sunday. Mergansers are mainly a freshwater duck species that will sometimes winter in a saltwater estuary, according to The Cornell Lab of Ornithology. Also known as sawbills, fish ducks, or goosanders, mergansers most often net in tree cavities, according to Cornell.

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