The migration of the Curlew Sandpiper Calidris ferruginea in the Russian Far East

During both northward and southward migration, numbers of Curlew Sandpipers are generally small in the Russian Far East, the Pacific Ocean coast of Russia, from Vladivostok to Chukotka. In this region, they occur at the tidal flats of shallow bays as well as sandy and sandy-muddy beaches of lakes and rivers, and herb mires both on sea coasts and inland. Northward migration is synchronous, with an almost simultaneous appearance near Vladivostok and on Sakhalin Island, during the last 10 days May. During this period and in early June, they arrive on the farthest eastern breeding grounds. Curlew Sandpipers seem to migrate northward in a transit flight, and only stop when unfavourable weather conditions force delays. Adult birds depart first, in July. In the first half of August, migration of adults continues and migration of young birds starts. In the second half of August through October, mainly young depart for their non-breeding grounds.