Aquila chrysaetos
The golden eagle is a very large raptor, in length. Its wings are broad and the wingspan is . Golden eagles' wingspan is the fifth largest among living eagle species. Females are larger than males, with a bigger difference in larger subspecies. Females of the large Himalayan golden eagles are about 37% heavier than males and have nearly 9% longer wings, whereas in the smaller Japanese golden eagles, females are only 26% heavier with around 6% longer wings. In the largest subspecies ("A. c. daphanea"), males and females weigh typically and , respectively. In the smallest subspecies, "A. c. japonica", males weigh and females . In the species overall, males average around and females around . The maximum size of golden eagles is debated. Large subspecies are the heaviest representatives of the genus "Aquila" and this species is on average the seventh-heaviest living eagle species. The golden eagle is the second heaviest breeding eagle in North America, Europe and Africa and the fourth heaviest in Asia. For some time, the largest known mass authenticated for a wild female was the specimen from the "A. c. chrysaetos" subspecies which weighed around and spanned across the wings. American golden eagles are typically somewhat smaller than the large Eurasian species, but a massive female that was banded and released in 2006 around Wyoming's Bridger-Teton National Forest became the heaviest wild golden eagle on record, at . Captive birds have been measured with a wingspan of and a mass of , though this mass was for an eagle bred for falconry, which tend to be unnaturally heavy.