Waders near Lien Trung - Hanoi

Behind the brickworks is an open area with some seasonal cultivation on the shore of the Red river and some sandy area’s with in the river a big sandy island. link A group of 120 Spotted Redshanks and 15 Greenshanks were at the river bank. When they were flushed, they flew to the sandy island where another big group (50?) of waders were (too far to identify) and some 150 Grey Herons.
Other birds in the area: 5 Common Sandpiper, 4 Little Ringed Plover, 1 male Kestrel, 12 White Wagtail, 2 Paddyfield Pipit, 1 Plain Prinia, 1 Zitting Cisticola.
Jan