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.
The hardy Purple Sandpiper was until recently limited in winter mainly to the rough, rocky coasts of New England and Atlantic Canada. In the past few decades, though, the species has spread southward along the Atlantic coast—in part, due to the proliferation of new jetties. Audubon's climate model shows continued expansion of the wintering grounds, but not southward. Instead, the species is forecast to spread northward and inland in winter—not only in the Northeast, where it is currently centered, but also in the Northwest, but with over 50 percent loss in current climate space. Available habitat, in the form of sea rocks, abounds on the coasts of Alaska and southwestern Canada; if Purple Sandpipers colonize these regions, they may well persist.