R.D. Hamilton 1965 Stercorarius parasiticus Barrow Alaska Jun. 29 A pair of this birds were observed in the Barrel Area just S at ERB. They were seen in territorial flights directed against Pomarine Jaegers. It appeared that they had succeeded in crowing out a territory for themselves. One of the birds was a dark phase bird and the other a light phase bird. The tail appeared quite pointed as the birds flew. June 26 A pair of Parasitic Jaegers were observed flying over the N part of the Britton Area. This is presumed to have been the same pair seen earlier in the Barrel Area. The wing beats appeared to be very shallow. Later a pair presumably the same one was observed over the Barrel Area. Jun. 27 Two Parasitic Jaegers were observed in the Barrel Area in the morning. In the afternoon one Parasitic Jaeger was observed in the area around North Slough. Jun. 29 A pair of this species was observed in the Britton Area. July 1 A pair of this species was observed in the Barrel Area. July 3 A pair of Parasitic Jaegers were observed in the Barrel Area. July 4 One Parasitic Jaeger was observed in the Britton Area. July 5 One bird was observed in the Britton Area. July 6 A pair of this species was observed in the Barrel Area.