By then peregrine falcons had become a species that “set off alarm bells” about the use of DDT, an insecticide that thinned their eggs, leading to global population crashes, said Letcher.

DDT decimated peregrine falcons In the 1970s, peregrine falcons had disappeared from eastern North America after use of the insecticide DDT weakened their eggshells and populations were decimated.

From 1959-1989 there were no peregrine falcons found in the wild in Iowa. Now, these raptors are seeing success in their ...

When you think of speed, cheetahs or race cars might come to mind, but the fastest creature on the planet isn’t a land animal ...

The fastest animal in the world almost ran out of time in Canada, but a chemical ban helped bring them back to our skies A testament to its resourcefulness, the peregrine falcon will dig its nests ...

In the 1970s, peregrine falcons were on the brink of extinction in most provinces because of pollution from DDT, an insecticide developed to protect crops and prevent the spread of disease.

In the 1970s, the peregrine falcon was on the endangered species list. While the population has bounced back, the peregrine isn’t out of the woods yet – it remains a species of special concern.

By then peregrine falcons had become a species that “set off alarm bells” about the use of DDT, an insecticide that thinned their eggs, leading to global population crashes, said Letcher.

Peregrine falcons are laced with higher levels of toxic flame retardants than any animal in North America — possibly more than any in the world — decades after the banned chemicals were phased out, a ...