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 Sharp-tailed Sparrow, now considered two species (Nelson’s and Saltmarsh) winter exclusively in saltmarshes along the Atlantic and Gulf Coasts of the U.S. Their collective winter range is projected to perhaps spread north into New England and the Maritimes, but their dependence on saltmarsh means that they won't be able to use inland areas and that sea level rise is an additional risk. Audubon's climate model doesn’t address the two species’ summer ranges. Based on projections for species with similar ranges and habitats (like Le Conte’s and Baird’s sparrows), the inland-nesting population of Nelson’s Sparrow may have a substantial shift in appropriate climate-space.