The foxes bred well in captivity, but early releases were soon snapped up by golden eagles, so the park service had to first relocate the goldens to the mainland and then reintroduce the balds, carefully stewarding their eggs until the channel cleared of DDT.

FORBES: Report: Endangered Species Act Works

But with the balds weakened, the goldens took up residence and began dining on terrestrial prey as is their wont: feral piglets released by historic human ranching operations on the islands and the tiny island foxes, who only have one to four pups a year.

FORBES: Report: Endangered Species Act Works