The Snowy owl (Bubo scandiacus) is an owl native to the Arctic regions of North America and Eurasia. They hunt rodents.
Lemmings are a favourite prey.
The male's mating call sounds like krek-krek, while the female's mating call sounds like pyee-pyee or prek-prek.
In the novel Harry Potter and the Philosopher's Stone (USA edition: Harry Potter and the Sorcerer's Stone), Harry is assigned a female snowy owl as his animal companion. Her name is Hedwig.