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In addition to the higher likelihood of exposure due to their habitat, harlequin ducks have a number of characteristics that makes them particularly sensitive to oil pollution," said Esler.
We radio-marked 34 female Harlequin Ducks and monitored them from their arrival in breeding areas (late Apr) until the majority of females had departed for wintering areas (early Aug).
Indeed, he speculates, this contamination may explain why some key mussel consumers-such as otters, harlequin ducks, and certain shore birdscontinue to suffer unabated oil-related reproductive difficulties despite low concentrations of petroleum in their water and on their home beaches.
It might not come across as a waterfowl mecca, but the Pacific Flyway offers unique waterfowl hunting, including species such as brant and harlequin ducks.
Best bets: Week Harlequin Ducks are Oregon's only "anadromous" duck.
HARLEQUIN DUCKS, and TUNDRA and TRUMPETER SWANS: No open season.
Best bets: Harlequin Ducks are Oregon's only `anadromous' duck.
Harlequin ducks can be viewed in the spring and early summer along the middle and upper McKenzie River at Cooks Rapid or Bear Creek Rapid and the Middle Fork Willamette River around the town of Oakridge.