Lead Toxicity in Mute Swans

standards are now available, it is possible to standardize
analyses, using primary standard material
which cancels out an important disadvantage of the
cyanhaemiglobin method. ADH-575 therefore provides
an efficient tool to carry out detailed investigation
of the comparative haematology and haemopoietic
sensitivity of all animals to environmental
toxicants.
Acknowledgements-We are grateful to Mr S. McKeown of
Fota Wildlife Park for assistance with sampling, Mr D.
O'Leary for allowing access to his poultry farm, and Ors
T. F. Cross, T. C. Kelly and Y. Okasha for helpful
discussion.
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