poisoning of bald eagles and red-tailed hawks by carbofuran and fensulfothion in the fraser delta of british columbia, canada.during the winter of 1990 in the fraser delta of british columbia, canada, nine birds of prey were found with symptoms of anticholinesterase poisoning. immediate surgical removal of crop contents of three birds decreased mortality and recovery time. chemical analysis was conducted on crop contents, which contained mainly duck parts. a bald eagle (haliaeetus leucocephalus) contained 200 micrograms/g and a red-tailed hawk (buteo jamaicensis) 2.2 micrograms/g carbofuran, while the crop of another r ...19968827674
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