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.
Noisy and rambunctious, the Marsh Wren inhabits cattail marshes across much of the continent. Two populations are distinct, possibly representing separate species. Eastern birds require large marshland complexes, and local population declines have been documented; western birds are more adaptable, often occurring in small, degraded marshes. Audubon's climate model forecasts a 74 percent loss of current summer range, with some potential for expansion during the winter. At both times of year, the model shows a general drift northward of the potential range. If cattails are present in newly created areas of suitable climate, Marsh Wrens may adapt—especially in western North America.