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Organochlorine residues and autopsy data from bald eagles 1966-68

January 1, 1970

Sixty-nine bald eagles found moribund or dead in 25 States during 1966-68 were analyzed for pesticide residues. Residues of polychlorinated biphenyls and DDE were detected in all samples of eagle carcasses; residues of dieldrin were detected in 68 and residues of DDD in 64; DDT, heptachlor epoxide, and DCBP were detected less frequently. Eight specimens had levels of dieldrin in the brain within the lethal range, and another probably died of DDT poisoning. Autopsy revealed that illegal shooting was the most frequent cause of mortality of these eagles; electrocution, impact injuries, probable lead poisoning, and infectious avian diseases were other causes of mortality.

Publication Year 1970
Title Organochlorine residues and autopsy data from bald eagles 1966-68
Authors B. M. Mulhern, W. L. Reichel, L. N. Locke, T. G. Lamont, A. A. Belisle, E. Cromartie, George E. Bagley, R. M. Prouty
Publication Type Article
Publication Subtype Journal Article
Series Title Pesticides Monitoring Journal
Index ID 5221245
Record Source USGS Publications Warehouse
USGS Organization Patuxent Wildlife Research Center