The darker the color, the more favorable the climate conditions are for survival. The outlined areas represent approximate current range for each season. More on reading these maps.
Threatened with extinction only a few decades ago, the regal Trumpeter Swan has made a remarkable comeback. Part of that comeback is due to successful efforts by conservationists to establish Trumpeter Swan populations in the Great Lakes area where it had been eliminated by hunting long ago. Audubon's climate model projects a 67 percent loss of current winter range by 2080, with a dramatic shift northward projected. The eastern populations, which are expanding at a rapid pace, are probably still too new to be accurately accounted for by the model (especially when competition with the nonnative Mute Swan is taken into account).