Nation ‘Success story’: Number of American bald eagles has quadrupled since 2009, experts say March 29, 2021 Mary Whitfill, The Patriot Ledger Comments Off on ‘Success story’: Number of American bald eagles has quadrupled since 2009, experts say The number of American bald eagles has quadrupled since 2009, with more than 300,000 birds soaring over the lower 48 states, according to experts.