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.
One of the most dramatic avian range expansions in recent history has been that of the Cave Swallow. Formerly unheard of in North America north of Florida and south Texas, the species is now a regular in small-to-medium flocks on fall migration north all the way to New England and the eastern Great Lakes. The birds tend to disappear by early winter, but the model predicts change in that regard. Audubon’s climate model projects a radical shift in winter climate space for this species, with only 6% of the current remaining stable by 2080. However, this species lives mostly south of the United States and Canada, and its prospects in Latin America and the Caribbean are not addressed by the model.