Letters

01 February 1995
Comments Letters Bernard Zonfrillo (1994) did well to remind us of the anniversary of the extinction of the Great Auk Pinguinns impennis. I have visited many of the world's museums and have examined specimens of the Great Auk and other extinct species, and just handlin...
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Letters

01 May 1979
Comments Letters A symbol for individuals not adult males The present biological symbols ♂ and ♀ indicate the two sexes, male and female. The suggested introduction of a third symbol {Brit. Birds 71: 544-545) seems strangely illogical. If the...
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Letters

01 April 1979
Comments Letters Birds dunking food There are many references in the literature to birds washing food; they cover about six families and almost all are for water birds. Although termed 'food washing', the behaviour described may fulfil several functions. During...
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Letters

01 January 1957
Comments Letters " ATMOSPHERIC TURBULENCE AND BIRD F L I G H T " S I R S , -- I n his letter on the above subject (antea, vol. xlviii, p p . 557-559) I. C. T . Nisbet puts forward an ingenious theory of wind-determination by feel. While agreeing that it is possible, I als...
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