Consultez les articles du Bulletin Aves !
Aves, 9/3 | 1972 | 85-103
During three oceanographic cruises in the South-eastern part of the North-Sea, I spent a total of 82 hours (in 41 days) watching birds. Three periods, corresponding to the three cruises, are recognized : 1. (from 24 VI to 9 VII 1971). Only a few birds were seen. They form small stable homogenous populations. The Fulmar (Fulmarus glacialis), Gannet (Sula bassana) and Kittiwake (Rissa tridactyla) were present. 2. (from 16 VIII to 16 IX 1971). The period of dispersion and autumnal migration. The birds were more abundant; they showed an unstable and heterogenous distribution. Many of then were clearly moving South-West (Common Scoter Melanitta nigra, "Commic" Terns Sterna sp., Sandwich Tern Sterna sandvicensis). The only Shearwaters (one Manx Puffinus puffinus puffinus and two Cory's Calonectris diomedea) were seen during this period. 3. (from 3 to 17 I 1972); Only a few species were present, but each one was numerous, stable and homogenously distributed : they included the common Scoter, Herring, Black-headed, Great Black-backed and Common Gulls (Larus argentatus, L. ridibundus, L. marinus, L. canus). Some Gannets and Alcidae were present, but only one Fulmar was seen.