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作者单位: | The Institute for Bird Populations, P.O. Box 1346, Point Reyes Station, CA, 94956–1346, United States of America;Commonwealth of the Northern Mariana Islands, Division of Fish and Wildlife, Department of Lands and Natural Resources, P. O. Box 10007, Saipan, MP, 96950, United States of America;The Institute for Bird Populations, P.O. Box 1346, Point Reyes Station, CA, 94956–1346, United States of America;The Institute for Bird Populations, P.O. Box 1346, Point Reyes Station, CA, 94956–1346, United States of America;The Institute for Bird Populations, P.O. Box 1346, Point Reyes Station, CA, 94956–1346, United States of America;The Institute for Bird Populations, P.O. Box 1346, Point Reyes Station, CA, 94956–1346, United States of America
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