1960 Bird Arvey Journal June 23 Cant tell whether the entrance-exit differences are due to the fact that entering birds enter at the moving head of the flock or not. Maybe all birds joining the flock go to its head, and gradually move toward its tail and then take off. Perhaps wind direction influences this also. 9:15 - Noticeable activity at the head of the flock; they are getting up and flying back to positions further W in the flock. Perhaps the fish changed direction? Exceptions occurred to the entrance exit hypotheses; birds were getting up as others were putting down at the head of the flock. 9:20 - The main flock appears to be behind Sugarloaf now, but a moderate number has been isolated in Fishermans bay. Most of the arrivals are going to the Sugarloaf portion. Just saw a V shaped cormorant flock of 25-30 birds heading around Sugarloaf from Fishermans bay, then putting down at the extreme W. end of the flock. 9:40 Direction change again. Many birds up from the Sugarloaf flock moving NW about 100 yards