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 bird’s name says it all: this chickadee is a denizen of the boreal forest. Although several other chickadees’ ranges penetrate into the boreal, none are so closely linked to this ecosystem. Recent population declines are thought to be due to logging. Audubon's climate model forecasts losses in both summer and winter of suitable climate space, with sharper losses in summer. Given that the species is nearly sedentary, the summertime climate will likely be the stronger driver of the Boreal Chickadee’s future range: squeezed farther and farther north in a region already under pressure from timbering.