Fig. 1

Locations of the Chongming Dongtan Nature Reserve (CMDT, filled triangle) and the Yalujiang Estuarine Wetland Nature Reserve (YLE, filled triangle) in the Yellow Sea. The inset map shows the locations of the Yellow Sea (square) and the main breeding area (hollow circle) in east Siberia and the nonbreeding area (filled circle) in northwest Australia of Great Knots along the East Asian-Australasian Flyway