What insecticide caused a major reduction in bald eagle populations until 1972?
Bald eagle declared an endangered species in the U.S. in 1967, and amendments to the 1940 act between 1962 and 1972 further restricted commercial uses and increased penalties for violators. Perhaps most significant in the species' recovery, in 1972, DDT was banned from usage in the United States due to the fact that it inhibited the reproduction of many birds. DDT was completely banned in Canada in 1989, though its use had been highly restricted since the late 1970s. With regulations in place and DDT banned, the eagle population rebounded. The bald eagle can be found in growing concentrations throughout the United
Bald Eagle Creek Path Creek and soon crossed into what is now Centre County, where it passed through what is now Bald Eagle State Park. Opposite the Lenape (or Delaware) village of Bald Eagle's Nest (modern Milesburg), the path crossed the creek and went through the water gap in Bald Eagle Mountain made by Spring Creek. The path turned south again at the site of modern Bellefonte, and followed Buffalo Run along the eastern side of Bald Eagle Mountain as far as the modern village of Waddle. Continuing on a southwest course along the edge of Bald Eagle Mountain, the path left Centre County