Least Feast 7/23/14 Least Sandpipers in flight at the Liberty Loop this afternoon, 7/23/14. QUICK POST: Shorebirds are on the move now! Observed on the southern end (the back pool) of the Liberty Loop this afternoon: Killdeer: 20+ Spotted Sandpiper: 1 Solitary Sandpiper: 3 Lesser Yellowlegs: 1 Semipalmated Sandpiper:5 LEAST SANDPIPER: 48 One of 48 (!) Least Sandpipers at Wallkill River NWR, Liberty Loop, 7/23/14. I have these as three Least Sandpipers with one Semipalmated Sandpiper (closest to front center). Liberty Loop, 7/23/14.