Manx Shearwaters plunge-diving

Manx Shearwaters Puffinus puffinus commonly feed by plunge-diving, in the manner described by Bernard King {Brit. Birds, 67: 77), when fish shoals are located very close to the surface. I think that the presence ,of numbers of predatory fish is an important contributory factor, serving to concentrate previously widespread smaller shoals which have attracted large


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