Affiliation:
1. U.S. Fish and Wildlife Service, Division of Migratory Bird Management Vancouver WA 98683 USA
2. U.S. Geological Survey, Alaska Science Center Anchorage AK 99508 USA
3. U.S. Fish and Wildlife Service, Division of Migratory Bird Management Anchorage AK 99503 USA
Subject
Nature and Landscape Conservation,Ecology,Ecology, Evolution, Behavior and Systematics,Nature and Landscape Conservation,Ecology,Ecology, Evolution, Behavior and Systematics