Wolves could expand across the eastern U.S.—but they might need help
From GreatLakesEcho.org:
Gray wolves could thrive in the eastern United States well beyond their current range in the Great Lakes region, but they might have a hard time reaching other suitable habitats without human intervention, researchers say.
Wolves once had the largest known range of any land mammal but they were nearly exterminated in the United States in the early 1900s after persecution by humans. Their population only recovered after they were placed under federal protection in the 1970s. They have since recolonized some areas where they once flourished, including in Minnesota, Wisconsin and the Upper Peninsula of Michigan.