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Apparent breeding success drives long-term population dynamics of a migratory swanApparent survival of an Arctic-breeding migratory bird over 44 years of fluctuating population sizeInter-annual variability and long-term trends in breeding success in a declining population of migratory swans.Modelling Bewick's Swan telemetry data to assess collision risk for the birds migrating across Europe: a cumulative impact assessmentCygnus columbianus Bewick's Swan and Whistling Swan