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.
Among the three bluebird species, this is the one most closely tied to forests—and to forest health. Snag removal, salvage logging, and fire suppression are believed to have contributed to recent population decreases, and the Western Bluebird is declining in or absent from some areas of seemingly suitable habitat. Audubon's climate model forecasts a 63 percent loss of current winter range by 2080. At both times of year, suitable climate space is projected to spread east and a bit north. In order for the bluebirds to follow suit, healthy forests will be required—especially in summer.