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Published on Jul 15, 2015
By the 1960s the peregrine falcon (Falco peregrinus) was extinct in many states - including Illinois - because of the negative effects of the pesticide DDT. But, thanks to dedicated reintroduction and monitoring efforts over the last 30 years in part from Field Museum scientist Mary Hennen and The Chicago Peregrine Program, just recently these birds were removed from the Illinois threatened species list!