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.
Often seen coursing low over grasslands, the Northern Harrier can be easily identified by a white rump and long, narrow, wings held up in a “V.” It is a common and widespread bird across all but the most northern reaches of Canada and the continental states. Projections show its current winter range (which also extends well into Middle America) to be quite stable. Audubon's climate model shows that the American population of this species, which is sometimes treated separately from birds in the Old Word, may undergo a shift northward and experience a significant contraction of summer range, losing 85 percent of its current range during that season.