Wildlife Damage Management, Internet Center for


Date of this Version



Published in Journal of Wildlife Diseases Vol. 9, January, 1973.


Mass mortality among migratory birds at Grand Forks, North Dakota, was attributed to a mosquito control operation employing the insecticide fenthion. The factors involved may have included the toxicity of the pesticide for birds, the method of application and coincidence with the peak of the spring warbler migration.