The Purple Sandpipers were feeding in some of the pools that formed after a wave hit the jetty. I am not sure exactly what they were finding to eat there, or if they were finding anything in the pools. Perhaps the waves carried some small animals onto the rocks.
Others were working the edges of the jetty, but they had to run for cover whenever one of the larger waves crashed.
The were also Ruddy Turnstones, like the one above. These moved faster than the Purple Sandpipers, so they were harder to photograph, even though sometimes they ran right past my feet.
Most of the Sanderling were on the beach, but one ran up on the jetty.