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.
Đôi khi nó được gọi là cú lớn nhất thế giới dù cú bắt cá Blakiston (B. blakistoni) trung bình hơi nặng hơn và cú xám lớn (Strix nebulosa) trung bình hơi dài hơn.