EAC 7, Shearwater, April 1967
Page 42
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Transcription
Western Gull (Larus argentatus) 4 These were the first sightings for this species in the grid. All were adult birds, and two females collected had enlarged gonads. Although the change of status within the grid does not seem large enough to be significant, it does seem possible that they were migrants based on data collected in the non-grid areas. Short-billed Gull (Larus canus) 1 The collection of this species constitutes the first grid record. The specimen was a subadult with light fat, and was in the northwest portion of the grid. Sabine's Gull (Xema sabini) 2 Two were seen in the northeast portion of the grid. All the sightings to date would suggest that along this portion of the coast this species is most apt to occur between 50 and 150 miles of the shoreline. Pomarine Jaeger (Stercorarius pomarinus) 1 Long-tailed Jaeger (S. longicaudus 1 Jaeger sp. (Unidentified) 2 All of the grid jaeger sightings were in the eastern half of the north section where they have been frequently noted since January. Red Phalarope (Phalaropus fulicarius) 927 + 7 nocturnal The densities of this species have been high and irregular over the last three cruises. During this survey unprecedented numbers were recorded, especially in the central portion of the grid. Their distribution seems to be very local, as was well demonstrated on 22 April. On this day a 20 mile portion of the cruise track was surveyed three times (see report introduction.) During these three transects virtually no Red Phalarope were seen. Yet just to the west (within 20 miles) hundreds were seen along a 20 mile line.