Largest owls in the world threaten British birds
Eurasian Eagle-Owl (Bubo bubo) is a very large and powerful bird, smaller than the Golden Eagle but larger than the Snowy Owl. 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 Great Grey Owl (Strix nebulosa) is slightly longer on average.