When Peregrine Falcons, in turn, ate these small birds, DDT accumulated in the falcons’ systems as well, but at an even higher rate. The more contaminated insects they ate, the more they themselves became contaminated. When small birds ate insects contaminated by this pesticide, some of this chemical remained in their bodies. By the 1960s, Peregrine Falcons were gone from the eastern United States and large portions of the western states due to the effects of this pesticide.Īt the time, DDT was being sprayed in agricultural fields, marshes, and other landscapes as a means to control insect infestations.
In the mid-1900s, the pesticide DDT was having a devastating effect on many bird species and other wildlife across North America.
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