A bald eagle on a perchBirdImages/Getty ImagesBiden signed a bill making the bald eagle the official national bird of the United States.The bald eagle, an iconic American symbol, was endangered but has since recovered.The bill received bipartisan support and was backed by eagle advocates.One prominent member of American society received a promotion with bipartisan support this holiday season: The bald eagle is now the official bird of the United States, a proclamation nearly 250 years in the making.On Christmas Eve, President Joe Biden signed into law a bill that amended title 36 of the United States Code and designated the bald eagle as the official national bird.