What is the largest duck in north America?

The largest species of duck in North America is the trumpeter swan. Trumpeter swans are large waterfowl that are native to North America and considered the largest waterfowl species on the continent. They are known for their long necks and wingspans and can reach lengths of up to 1.52 metres (60 inches). Trumpeter swans primarily inhabit wetlands, lakes, and estuaries in the northern regions of North America, including Alaska, Canada, and the western United States. They feed on aquatic plants and small animals. Despite their large size, trumpeter swans are capable fliers and can migrate long distances during the winter months.