Recently, sightings of a peregrine falcon have been reported in Suffolk County, marking an important moment for the species’ recovery. Peregrine falcons experienced a severe population decline in eastern North America during the mid-20th century due to the widespread use of the pesticide dichlorodiphenyltrichloroethane (DDT).
DDT was originally sprayed on humans for malaria protection and was later widely used on crops. While effective as a pesticide, DDT had serious consequences on wildlife; it became linked to health risks, including cancer and birth defects. As apex predators, peregrine falcons were especially affected, as the chemical became concentrated at the top of food chain. As a result, their eggshells experienced significant thinning that drastically reduced successful reproduction. The population declined heavily, leaving the species endangered.
In 1970, the use of DDT was banned in the United States, although effects lingered for several years after due to the chemical’s long half-life of up to 15 years. Despite this, conservation efforts combined with the ban allowed peregrine falcon populations to boost back up to more stable numbers. This recent sighting in Suffolk County highlights the success of such conservation efforts.
