Bubo vs. Nyctea
Recently updated authorities (Clements 6th edition, 2007; IOC 1.6, 2008) have reassigned Snowy Owl (scandiacus/a) to the genus Bubo because DNA results place Snowy Owl among branches containing Bubo owls. However, Howard & Moore (2003) and Sibley & Monroe (1996) retain this species in Nyctea, and the Opus awaits further clarification.