On the tern breeding island in the distance, to the south of the boardwalk, they appeared as large black birds with red bills. Only when they fly do the white underside and the long black bill-tip become visible.
I had arrived earlier than expected and still had a couple of hours until dusk. A group of big cameras were gathered further up at the inlet from the northern lagoon and were probably taking pictures of the terns fishing in the current there. I considered going up to join them for a while before the skimmers started, but was sidetracked by a Peregrine Falcon flying over and moments later the tern colony exploded.
Skimmers at Bolsa Chica, Los Angeles, LAX