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THE WILSON JOURNAL OF ORNITHOLOGY • Vol. 124, No. 2. June 2012 
Studies occurring along migration routes may 
misrepresent populations, because different age or 
sex groups may migrate along different routes. 
ACKNOWLEDGMENTS 
We thank the staff at the Manomet Center for 
Conservation Sciences for their generosity and cooperation 
in sharing their data. The findings and conclusions in this 
paper are those of the authors and do not necessarily 
represent the views of the funding agencies and organiza¬ 
tions. 
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