Steller's sea eagle
It had a relatively short wingspan for its size. It is estimated that the grown female typically spanned up to , possibly up to in a few cases. This wingspan is broadly similar to the larger range of female size in some extant eagles: the wedge-tailed eagle ("Aquila audax"), golden eagle ("A. chrysaetos"), martial eagle ("Polemaetus bellicosus"), white-tailed eagle ("Haliaeetus albicilla") and Steller's sea eagle ("Haliaeetus pelagicus") are all known to exceed 2.5 m in wingspan. Several of the largest extant Old World vultures, if not in mean mass or other linear measurements, probably exceed Haast's eagle in average wingspan as well.