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Canada goose 1989 Alaska Bird populations Canada goose -- Oregon -- William L. Finley National Wildlife Refuge (Or.) -- Feeding and feeds -- Longitudinal studies Canada goose -- Wintering -- Oregon -- William L. Finley National Wildlife Refuge (Or.) -- Longitudinal studies Ducks -- California -- Tulare Lake Ducks -- Wintering Ecology Ecology, Evolution, Behavior and Systematics Exxon Valdez Oil Spill Forage plants -- Oregon -- William L. Finley National Wildlife Refuge (Or.) -- Longitudinal studies Geese Harlequin duck -- Effect of oil spills on -- Alaska -- Prince William Sound Harlequin duck -- Food -- Alaska -- Prince William Sound Lake -- Ecology Nature and Landscape Conservation Northern pintail -- Ecology -- California -- San Joaquin Valley Oil spills -- Environmental aspects -- Alaska -- Prince William Sound Oil spills and wildlife -- Environmental aspects -- Alaska -- Prince William Sound Water birds -- Oregon -- Abert Wetlands -- California William L. Finley National Wildlife Refuge (Or.)