Trumpeter Swan
Photo: The Cosmonaut, CC BY-SA 2.5 ca
Lewis and Clark observed trumpeter swans at multiple points during the expedition. Large flocks were first noted in marshes near their winter camp at Wood River, Illinois, on February 15, 1804, before the main expedition departed. They later encountered the species along the Missouri River. Their observations were among the first to distinguish the trumpeter swan from the smaller tundra swan. The trumpeter swan is the largest native waterfowl species in North America.
Journal Excerpt
Lewis, March 9, 1806: "The large Swan is precisely the same common to the Atlantic States… we first saw them below the great narrows of the Columbia near the Chilluckkittequaw nation. They are very abundant in this neighbourhood and have remained with us all winter."
Journal References
15 journal entries mention Trumpeter Swan