The Eurasian eagle-owl is a very large bird, smaller than the golden eagle (Aquila chrysaetos) but larger than the snowy owl (Bubo scandiacus), despite some overlap in size with both species. It is sometimes referred to as the world's largest owl, although Blakiston's fish owl (B. blakistoni) is slightly heavier on average and the much lighter weight great grey owl (Strix nebulosa) is slightly longer on average. Heimo Mikkola reported the largest specimens of eagle-owl as having the same upper body mass, 4. 6 kg (10 lb), as the largest Blakistonâs fish owl and attained a length of around 3 cm (1. 2 in) longer. In terms of average weight and wing size, the Blakistonâs is the slightly larger species seemingly, even averaging a bit larger in these aspects than the biggest eagle-owl races from Russia. Also, although 9 cm (3. 5 in) shorter than the largest of the latter species, the Eurasian eagle-owl can weigh well more than twice as much as the largest great grey owl. The Eurasian eagle-owl typically has a wingspan of 131â188 cm (4 ft 4 inâ6 ft 2 in), with the largest specimens possibly attaining 200 cm (6 ft 7 in). The total length of the species can vary from 56 to 75 cm (22 to 30 in). Females can weigh from 1. 75 to 4. 6 kg (3. 9 to 10. 1 lb) and males can weigh from 1. 22 to 3. 2 kg (2. 7 to 7. 1 lb). In comparison, the barn owl (Tyto alba), the world's most widely distributed owl species, weighs about 500 g (1. 1 lb) and the great horned owl (Bubo virginianus), which fills the eagle-owl's ecological niche in North America, weighs around 1. 4 kg (3. 1 lb).
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