Stocky and dark overall. Short tail, triangular wings, and long, pointed bill. Close look reveals beautiful plumage. In breeding season, shows purple and green iridescence on body with yellow bill. In winter, bold white spots cover the entire body. Native to Europe; introduced to North America and other regions worldwide, where it is now abundant. Often in large flocks. Makes variety of squeaky vocalizations, and mimics other species. Visits feeders, and is often aggressive.