Rover represents part of an ongoing trend of birds of prey moving into urban areas. Raptor populations plummeted in the first half of the 20th century because of widespread hunting and use of the insecticide DDT. These chemicals traveled up the food web and accumulated in predators such as bald eagles, making their eggs’ shells too thin to support the parent’s weight, said Jen Cruz, a population ecologist at Boise State University.” Read more of the article by Ryan Mandelbaum from the New York Times.