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The decline of the peregrine falcon in the eastern U.S. has been linked to persistent organochlorine pesticide contamination. The eastern population plunged from 350 active sites in the 1940's to no active breeding birds in 1964. Recovery efforts began in 1975 after DDT was banned in the U.S. The NJ Division of Fish and Wildlife and the Peregrine Fund first hacked falcons in 1975 and continued at several sites until pairs established territories. In New Jersey, the recovery goal is consistent,doi:10.7282/t3kd1zpf fatcat:jfpetinvg5h6bc3ehw4s4fkguq