Cygnus buccinator, commonly known as the Trumpeter Swan, is native to North America. It is primarily found in Canada and the northern United States, with significant populations in Alaska, British Columbia, Alberta, and the northern parts of the Rocky Mountains region. Initially extirpated from large parts of its range due to hunting and habitat destruction, conservation efforts have helped re-establish populations across its native range.

Trumpeter Swans primarily inhabit large, shallow wetlands, including lakes, rivers, marshes, and slow-moving ponds. They prefer areas with abundant aquatic vegetation, which is essential for their diet and nesting. In winter, they move to ice-free water bodies that might include coastal estuaries and lower elevation marshes.

As one of the heaviest flying birds, Trumpeter Swans occupy an ecological niche within freshwater wetland ecosystems. They are herbivorous, feeding primarily on aquatic plants. Their grazing can influence the composition and structure of the wetland flora. During breeding seasons, they select secluded areas for nesting, usually on a raised area in the water. Their presence can affect nutrient cycling and provide habitat for other species.