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Archive for October 18, 2021

Adult Common Loons Molting & Migrating

At this time of year, adult Common Loons are undergoing a partial molt, during which they transition from their striking black-and-white breeding plumage into their gray-and-white winter plumage. This transition typically begins with the feathers surrounding the bill.

Many adult loons have departed from their northern freshwater breeding lakes, heading for their coastal New England wintering grounds.  Juvenile loons linger, sometimes remaining on their natal or adjacent lakes until near freeze-up.  Once they arrive on their wintering grounds, they will remain there for the next two to four years before returning to their inland breeding grounds. (Photo: adult Common Loon in foliage-reflecting water)

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