The
Long-tailed Duck is frequently found in offshore waters around Cape Cod and
Nantucket 
during the winters but breeds in the
Arctic region during the summer months. The Long-tailed Duck was formerly known as the
Oldsquaw. The long tail refers to a pair of elongated black tail feathers that stream behind the male ducks as they fly. It is a midsize sea duck and dives sometimes to depths of almost 200 feet to sustain a broad diet of
mollusks,
crustaceans, insects, and fish. The male has an overall round body with short dark wings, a white underparts with a black breast band, and a pale head with a large dark patch on the side of its head.
According to Wayne Petersen in
Birds of Massachusetts, “the annual late fall and winter concentrations of Long-tailed Ducks off Nantucket Island are one

of the most spectacular ornithological phenomena that occur in Massachusetts.” A fascinating article from the
Nantucket Inquirer and Mirror noted that Nantucket is “home to the world’s most concentrated population of long-tailed ducks – and an important habitat for 14 other
sea-duck species – and has become a focal point for sea-duck research.” Mass Audubon ornithologist,
Simon Perkins, said “it’s one of the greatest avian spectacles in all of North America. Mass Audubon first received funding to study the Nantucket’s long-tailed duck migration patterns in response to the proposed
Cape Wind wind farm project.” In the winter of 2007-2008, Mass Audubon staff in partnership with the U.S. Geological Survey began using
satellite telemetry to gather information on nighttime roosting locations for Long-tailed Ducks in Nantucket Sound. The Mass Audubon Long-tailed Ducks Telemetry Research Project is now in its third season with
weekly updates posted online. For a project overview, read an informative article by Simon Perkins in the
“Connections” newsletter published by Mass Audubon.
Birding Nantucket author, Ken Blackshaw, has traveled the world over courtesy of the U.S. Air
Force and IBM, seeing birds, studying their behavior and authoring and editing many books about birds. He writes a weekly article for the Nantucket Independent newspaper. In a recent article he explains the phenomena of Long-tailed ducks around Nantucket. For more information, click here to learn more about the daily movements, flight patterns and feeding habits in the context of habitat management and protection. You are invited to click here to view recent additional flight images of Long-tailed Ducks.
Enjoy,
Craig Gibson
Woods Hole