Bobwhite quail born from eggs treated in a similar manner showed skeletal deformities but no spinal abnormalities. Metabolism and excretion rates for diazinon are rapid. The half-life of diazinon in animals is about 12 hours. The product is passed out of the body through urine and in the feces. Bird kills associated with diazinon use have been reported in every area of the country and at all times of the year.
Birds are significantly more susceptible to diazinon than other wildlife.
In hard water, lake trout and cutthroat trout are somewhat more resistant. There is some evidence that saltwater fish are more susceptible than freshwater fish. Bioconcentration ratios range from 200 in minnows to 17.5 for guppies. Diazinon has a low persistence in soil. The range is from 2 to 14 days.