Letters

The spread of potato-eating i n Whooper Swans Sirs,--A tendency for flocks of up to 40 Whooper Swans Cygnus cygnus to feed inland is well attested in early European literature; and in Scotland these swans, like geese, occasionally fly some miles from water to feed in stubbles or well-erown oasture. In recent winters they have also been found grazing winter wheat fields, although only in small numb...