The Whooper Swan is the largest of the 2 migratory swan species which visit the UK in the winter. It is estimated that about 15,000 birds winter in the Uk of which around 7-8.000 winter on the Ouse washes in Norfolk and Cambridgeshire. It can be separated from other swan species by the large yellow triangular marking on the bill.
Reblogged this on sed30's Blog.