FIELD NOTES Doug Bell LOCATION: Alcatraz Island, San Francisco Bay, Calif. DATE: May 4, 1985 WEATHER: Clear, but some high thin haze present Sunny. TIME: 13:20 - 13:50 Observing gulls on IB (Industry Building (Laundry)). in courtship behavior - the female walked over to the male giving a mew call. With each "mew" she would cock her head back and pull it in, into her shoulders. (Immature gulls beg food in a similar manner). At the same time the female positioned herself to face the male at an angle, from one side. While mewing she also billed the male's bill, especially on the sides and at the gony. The male responded with direct billing. The female's mewing lasted on the order of 2-3 minutes. Another pair started mewing too, and it lasted of same duration. One Heerman's Gull sat on the cement boarder of the Industry Building's roof the whole time. It- sat on the boarder just above an incubating Western Gull. No apparent distress on either bird's part.