The Ruffed Grouse, Bonasa umbellus, is a medium-sized grouse occurring in forests from the Appalachian Mountains across Canada to Alaska. It is non-migratory. The Ruffed Grouse is frequently referred to as the "partridge". This is technically wrong - partridges are unrelated phasianids, and in hunting may lead to confusion with the Grey Partridge. That species was introduced to North America from Europe; it is a bird of open areas, not woodlands.