EAC 7, Shearwater, April 1967
Page 40
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Transcription
GRID SPECIES ACCOUNTS Black-footed Albatross (Diomedea nigripes) 35 + 4 nocturnal Density in both the north and central sections was lower than that recorded on the last survey. East-west differences were not as marked as in early April, but were still evident. An attempt was made to keep track of unusually marked individ- uals to determine how long they followed the ship. On 21 April two birds were followed closely; one followed about six hours and another for at least thirteen hours. On the 22nd another bird was recorded for more than ten hours. The numbers of birds with dark upper tail coverts outnumbered those with white or mostly white by 5:1. Laysan Albatross (Diomedea immutabilis) 1 One bird with an unusually pink bill was recorded in the eastern half of the central section. Fulmar (Fulmarus glacialis) 0 This is the first eastern grid survey to date on which no Fulmar were seen. Small Pterodroma (Not positively identified) 50 Judging by the field marks of the small Pterodroma which were well observed, it is felt that virtually all were Pterodroma cookii. Sightings were most common in the western half of the grid, espec- ially on the north leg. Why an equal number was not seen to the south at equivalent longitudes is puzzling. A noticeable decline was recorded between points B and C; thereafter sightings were relatively scarce. Most of those birds for which direction of travel was noted