Despite being chosen for the Great Seal of the U.S. in 1782, bald eagles nearly went extinct in the Lower 48. In 1963, there were only 487 nesting pairs remaining in the entire country. The Endangered Species Preservation Act of 1966 and the subsequent ban of DDT, a toxic pesticide, combined to foster the regrowth of the bald eagle population. By 1995, the U.S. Fish and Wildlife Service had delisted bald eagles from the endangered species list and moved them to the threatened list. In 2007, they were taken off the threatened and endangered species list altogether.