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 insects you hear in a marsh in north-central North America may not all be insects. The song of the Le Conte’s Sparrow is distinctly non-musical and harsh, resembling something more like a grasshopper than what most think of as birdsong. Continuing a trend in recent decades, the species is projected to shift its wintering range north considerably, mostly in the form of potential new climate-space becoming available. But that won’t matter if the model’s catastrophic predictions of the summer situation are correct: an almost complete (99 percent) loss of current range by 2080. Marsh grass grows quickly, so this migratory species may be able to adapt.