In 1962, Rachael Carson rocked the bird watching world with her book Silent Spring. She identified the commonly used pesticide DDT as the culprit responsible for declining populations of eagles, falcons and hawks. Rachael was able to prove that once DDT got into the food chain, it fatally weakened the eggshells of these birds.
Wild About Utah: Falconry
Utah News spotted this story at upr.org. Full coverage may follow as more sources report.