Two species of swans visit the Lake: Trumpeters and Tundras. The Tundra Swan was the only frequent visitor in the late twentieth century at which time the Trumpeter was listed as rare—lucky to see. That has changed: each species is now easy to find foraging in the shallows of the lake during migration.
These two species of swans differ in many ways—size, voice, breading range—yet when seen from a distance, they are difficult to distinguish. Many of the identifying marks, while characteristic of a species, may not be unique to it, so telling which is which is often not easy. Consequently, the identifications below should be viewed as tentative.