Any large, rapacious bird of the Falcon family, esp. of the genera Aquila and Haliæetus. The eagle is remarkable for strength, size, graceful figure, keenness of vision, and extraordinary flight. The most noted species are the golden eagle (Aquila chrysaëtus); the imperial eagle of Europe (Aquila mogilnik or Aquila imperialis); the American bald eagle (Haliæetus leucocephalus); the European sea eagle (Haliæetus albicilla); and the great harpy eagle (Thrasaetus harpyia). The figure of the eagle, as the king of birds, is commonly used as an heraldic emblem, and also for standards and emblematic devices. See Bald eagle, Harpy, and Golden eagle.