0650-1345, 1615-1740 135 clear, cool to warm, 10-35mph N wind Laurence C. Binford 100 species 89 Lake Merced, Pacifica, Moss Beach, Princeton Harbor, Pescadero Marsh, Pigeon Point, 6-17-73 Lighthouse Point (Santa Cruz), Natural Bridges S.P., Swanton Rd, Hwy 1 Common Loon Yellow-billed Loon** seems all four loons in June plus seven species of swallows in same day must be some kind of record 1 non-breeding plumage, Princeton Harbor 1 imm. Princeton Harbor - with Common Loon for comparison - the bird's bill was so much bigger (and the bird itself was so much larger) that I originally thought the Yellow-billed was a Common and the Common an Arctic (from 500yds). Both were in non-breeding plumage, but the Yellow-billed Loon was longer bodied, long-necked, and conspicuously longer-billed than the Common. It held its bill upward at an angle, giving it a much different aspect from the horizontal-billed Common. The bill was all yellow except for a dark smudge on the proximal 3/5 of the culmen. The culmen had a slight curve to it at the tip, indicating it was an immature. The back was paler than the Common's and had broader lateral pale barring. The nape was slightly pale brown but very inconspicuously so. The head pattern was quite distinctive brown darkish pale yellowish bill held upward at an angle pale dark patch behind ear we chartered a skiff ($1.00) and approached the bird to within 50 feet, getting fantastic views of both. They were the only birds in the harbor and are probably going to summer there. Arctic Loon 17 -> N - migrants in breeding plumage - late. Moss Beach, Pescadero, Pigeon Point Red-throated Loon 1 -> N - migrant in breeding plumage - 1 non-breeding and flightless at Pigeon Point Western Grebe 10 - Moss Beach, Pigeon Point Red-billed Grebe 5 - Lake Merced, Pescadero Sooty Shearwater 500+ Brown Pelican 46 Brandt's Cormorant 13 Pelagic Cormorant 11 Great Blue Heron 1 American Bittern 3 - Pescadero Marsh Mallard 3 - 19+ ducklings at Pescadero