A further note on the wing-spreading of Black Storks
In a recent note (Brit. Birds, 67: 236-237) M. D. England gave details of an unusual aspect of the feeding behaviour of some Black Storks Ciconia nigra in north-east Portugal. He described how the birds shaded the water in which they were fishing by raising and spread ing the wings, bringing them forward of the normal flying position, bowed a
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