Snowy Owl

The snowy owl (Bubo scandiacus) is a large owl of Arctic North America and the Palearctic that breeds mostly on tundra, and it is the only living owl with mainly white plumage. It is 50-60 cm long with a wingspan of 140-165 cm; males have a median mass of about 1,658 g and females about 2,102 g, so unusually for an owl the female is distinctly larger and the sexes are easy to tell apart. Adult males are nearly pure white while females and young birds carry extensive dark brown flecking, and the pattern of brown on the wing is the most reliable, if imperfect, guide to age and sex. The feathering extends to the toes and buries the short bill, the eyes are yellow and the bill black. It lives in open tundra, grassland, marsh and rocky ground, seldom perching in trees and instead using ice blocks, rocks and stumps. Where most owls are nocturnal it is often active by day, an adaptation to the Arctic summer's continuous daylight. Its breeding and numbers are tied closely to tundra lemmings, and in winter many birds move south into the boreal zone; in Japan it is recorded rarely in Hokkaido and northern Honshu, with occurrences as far south as Tottori and Hiroshima.

Source: Wikipedia (CC BY-SA 4.0)

The Snowy Owl lives 15+ years.

The Snowy Owl grows to 50-60cm (wingspan 140-165cm; males median about 1,658g with a range of 1,300-2,500g, females median about 2,102g with a range of 1,330-2,951g).