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.
In the late 20th century, the Wood Thrush was one of the most potent symbols of Eastern forests under siege. Sharp population declines were blamed on cowbird parasitism, nest predation, and habitat fragmentation. A new challenge is climate change. Audubon's climate model projects an 82 percent loss of current summer range by 2080, with a substantial shift in the offing, as new range could become available across much of what is today the boreal forest.