FIELD NOTES Doug Bell May 5, 1986 LOCATION: Alcatraz I., S.F. Co., CA. WEATHER: Broken clouds. Moderate wind 9:30am - 1/2 Ray Pirotti in blind. Pair 20 - female on nest, being "raped" by male (#8?). Possibly 2 from pair 19 also tugging at rapist's wing. Female 20 protests, biting males beak. Female able to push him off, stand up. Copulation on IB roof (1.5 min.) Copulation on cistern - behind pair 20. 9:52 Single bird standing on IB roof, drooped wings (like a hen). Near previous copulating pair. 9:57 chased off by male of pair or sim. 9:40 Copulation, IB roof. 9:51 Banded bird in cistern - ad., left leg yellow + USF&WS service band. 9:55 - loud ship feed - chicken fat (cistern). Short cop - elation - IB roof (< 1.0 min) 9:57 - feeding - fish pieces - new pair, cistern. 10:02 - Bird + drooping wings back on IB roof. 10:02 male in to mate on right cistern hery (in front). Mewed, walked ca 1 m., other male gram pull. Female follows. Male mews, female mews - male coughed up fish filled. Female took, bird flying overhead dived on her. Mate attacked first the diver, then his own mate, probably because he had tried to get some of food back. 10:20 IB - feeding - male coughed up chicken, swallowed again. 10:16 2 & 20 head tossed, begged on nest (4 times) then yawned. 10:18 - IB - pair men end walking side by side upright in half-circle. Pair gram pulling - right side of cistern. 10:28 Short face off - gram pull - males end of cistern. 10:31 - IB - worship feed - male + fish comes in bill, swallowed again. Copulation of another pair. 10:34 Copulation, IB roof. Cistern - male of new right pair - fish in bill, swallowed. Attempted copulation of female on nest (mid way - cistern). Female fought off. Pair of rapist boy calling. 10:38 Stunge male down in front, grass gathering, owner in upright threat approaching, stranger away.