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From the 1950's to the 1970's, organochlorine pesticides such as DDT caused the eggshells of Birds of Prey, including falcons, to become dangerously thin, preventing many of them from hatching. After these pesticides were banned, captive breeding programs for Peregrine falcons were implemented with great success. The Peregrine falcon was removed from the US Endangered Species List on August 25th, 1999, and today they are considered Least Concern by the IUCN. This species is one of the greatest conservation success stories in history.

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12y ago

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