1914 J Strong, Habits of the Herring Gull. 191 



which was broken up by the interference of a third adult. About 

 the same time I saw an attack on a juvenal gull by an adult 

 resented by another adult. Challenge cries and mewing calls 

 made a great noise at this time. Other juvenals which had been 

 standing near the place where the attack was made disappeared. 



A few moments later, I saw three gulls worrying a Great Blue 

 Heron in full flight, much as kingbirds harass a crow. The heron 

 finally disappeared in the woods on the largest of the Strawberry 

 Islands where a heronry was located and from which I had heard 

 noises throughout the night. 



Another fight between adults occurred at 5:15, and as usual with 

 no apparent injury to the participants. When the contest was 

 over, the two birds faced each other and made a feint at renewing 

 hostilities. Then they went through the challenge performance 

 simultaneously. 



At 5 : 25, I noted that I had seen no feeding and that most of the 

 juvenals gave no evidence of desiring their parents, but at 5:45 

 I saw a downy juvenal teasing an adult for food and a feeding 

 occurred a few minutes later. After the feeding, both birds drank 

 water, and the adult swam out from shore about twenty feet where 

 it took a bath. I noted at 6 : 25 that downy juvenals were standing 

 idly most of the time or dressing their plumage. An adult ap- 

 proached a juvenal, and another adult flew to the spot, apparently 

 to drive the first adult away. 



I was unable to determine what the gulls were doing during the 

 darker part of the night after the setting of the moon, beyond the 

 flying already mentioned. Judging from the sounds, many of 

 them were on the water as was the case during Ward's night 

 at Gravel Island. Whether the falling of the board had anything 

 to do with the absence of the gulls from at least my part of the 

 island is uncertain. As the birds left Gravel Island at nearly the 

 same time in the evening according to Ward's observations, there is 

 some reason to believe that the board accident was not responsible. 

 It is conceivable that there was some fear of the tent in the darkness 

 which did not exist in daylight. Or possibly, the birds feel safer 

 on the water at night and are in the habit of remaining there 

 in a flock during a major portion of the night, when uneasy. 



During the night of July 5 and 6, 1907, I camped on Partridge 



