We drove past the buildings at the air port and crossed over to the inner shore near the radio building. The first bird seen was a Red-throated Loon which really showed red feathers on the throat. We watched Bryant Sparrows, Horned Larks, Salt. Marsh Song Sparrows; then walked back along the shore to the slough at the bend where there were great numbers of gulls. On the water were 6 Farallone Cormorants, many Lesser Scaup, a few Surf Scoters; several groups of Hudsonian Curlews flew over. At the slough the tide was running out and four Caspian Terns were seen among the Gulls. Flocks of Black-vented Closver in full plumage began to appear and became very abundant - hundreds of them - very excitable - settling to feed then suddenly rising and circling about as an airplane plus over. The sandpipers were in great flocks too and some Dowitchers were seen. Least Sandpipers were closely identified but there may have been other kinds in the distance. As we came back Foster Terns appeared, actively feeding by dropping suddenly to the water. Very few willets were seen. I heard the calls of Long-billed Curlew but the Hudsonians were seen. Three Greater Yellowlegs were seen, List for the day: Red-throated Loon, Western Grebe (10+); Eared (or Horned Grebe) (1); Farallone Cormorants (6); Great Blue Heron (2); Canvas Backs (a few); Bluetails abundant; Ann Goldeneye - one female;.