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.
This is the smallest hummingbird in the U.S.—and one of the tiniest birds in the world. Despite its diminutive stature, the Calliope Hummingbird is hardy. These hummers undertake impressive migrations twice a year, and they regularly withstand cold nights near tree line well into the Canadian Rockies. Audubon’s climate model forecasts an expansion of areas with suitable climate, mainly north and east—but only 22% of the current summer range remains stable by 2080. It is unclear if this species will be able to take advantage of the newly climate-suitable regions. Not modeled is the winter distribution, which is primarily south of the United States.