Abstract
A quarter of a century's personal investigations, culminating in an intensive survey over the winters of 1969–70 to 1972–73, has given a broad picture of the distribution and relative proportions of the two wild swans wintering in Ireland. An increase and expansion of Whooper Swans has taken place since about 1943, and more recently there have been signs of a growth in the population of Bewick's Swans.
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