Black and White Wolves (IMAGE) University of Calgary Caption Black wolves dominate packs in the forests of North America, while white wolves are more numerous in the treeless tundra. Credit Marco Musiani, University of Calgary Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.