Snowy owls are a rare and coveted sight for bird watchers in the Midwest, but if you know what to look for you might have a better chance at spotting them. Reset learns more about snowy owl irruptions — the term for the mysterious and unpredictable migration cycle for the arctic bird — from Stephanie Beilke, senior manager in conservation science at Audubon Society Great Lakes and Edward Warden, president of the Chicago Ornithological Society.