Field Notes Doug Bell Date: 30 April 1986 Location: Alcatraz I, SF Co., Calif. Weather: Sunny, clear, some fog wraps Time: 9:15 - 4:57 With Ray & Katie in blind overlooking cistern / IB. Long calls: aggression, recognition. New calls: "I have food" call. Courtship feeding: chickens transfer on power house roof. Pair in front of blind: first exchanged large fish, 7". About 5 min later male of same pair coughed up midshipman - tug of war ensued (< 30 sec), female eventually got it. On 18 - another midshipman transfer. Forced copulation on nest 20 - male on top of nest-sitting? & pecking @ ?. Male very persistent - sitting on female for at least 1.5-2 min. Male (pub from nest 19) also gets hassled by probably his own female - meowing, trying to inter- vene - she is standing on rock above two, looking down, meowing, she also jumped down on them. Male still persist. Another pair brought in large fish (9") - transferred. Pair M copulating on IB. Another pair on Laundry Building copulating. 9:59-10:30 : Pair L copulating - male doing guttural. Forced copulation again - this time the pair in front of blind or cistern. Male making mimic call (like short long call), after < 20 sec the real mate of mated female flew in - knocked feet male off female. Two males then thrusted, choked, grappled. Interrupted food transfer - unident (chicken?). 2 more food transfers -> unident small, shiver-like objects. Female of previous pair regurgitated the 9" fish. Big wads of chicken regurgitated onto cement - nobody wants it. One male puked it up, brought over to his mate, dropped. She didn't eat it. Male ate it. Another chicken transfer. Pair at 20 transferred fish (herring, 7"). IB roof - food transfer - chicken, ? digested fish?