Ring recovery
Migratory connections based on ring recoveries and leg-flag sightings in eastern Jiangsu are presented in Table 1. Some dunlin individuals staging in Jiangsu came from Chukchi and Kamchatka peninsulas, Sakhalin Island, Yalujiang Estuary, South Korea, Chongming Island, Taiwan, Hong Kong, Beibu Gulf, and Leizhou Bay. The ring recoveries produced a rough migratory map that showed dunlin breeding in the Far East of Russia migrated through the Yalujiang Estuary, Jiangsu, and Chongming Island to winter in southern China (Supporting information Fig. S1). The numbers of ring recoveries from Kamchatka Peninsula and Sakhalin Island were greater than those from other locations. However, there were no resightings that indicated dunlins migrated from breeding areas in Alaska or the west of Russia.
Table 1. Summary of ring recoveries in the study area and associated areas