Calidris alba 15 June Barrow, Alaska - about 1730 saw a single bird. I 15' was watching a Baird Sandpiper, then this beast jumped out, landed fell, and then took off for about 100 yards, going up to about 10 feet hovering over the wind and flying like a Spotted Sandpiper with a quick, stiff wing beat. It bore for 1-2 minutes, so far off I couldn't tell against the wind if it was making any noise, then dove down towards the animal hut, still flying stiff-winged and I lost it to sight. About 3 minutes later a Baird's Sandpiper came whizzing by, the Sandpiper in hot pursuit, flying silently; the Bairds landed and the sandpiper went past about 5 feet to an exposed mound of soil and fed. I then lost all to sight. When I got to the animal hut there was a Sandpiper, alone, feeding along the edge of a mud pond, in gravel, sometimes in and sometimes out of its water. It appeared between feeding motions and appeared to get something each time I went through a series of feeding motions; it took food from the surface or near the surface, at most slicking the terminal quarter of its bill into the gravel, and often appeared to be crushing large prey items in the beak with a rapid series of motion as if it were jabbing, which was often clearly not the case. It eventually flew off, flushing a second shorebird of uncertain identity