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 Black-crowned Night-Heron (called simply “Night Heron” in the UK) is most active in the darker hours, when it stalks the water’s edge for prey, such as frogs and crayfish. Its comical, barking “wok” call passing overhead in the sky may be the only evidence of its presence in the dark. This widespread and adaptable species is found on all continents except Australia and Antarctica. Audubon’s climate model forecasts that both summer and winter ranges will spread northward, but that only 12% of the North American summer range will remain stable, a troublingly small area.
Are the projected range maps different from the range maps in field guides? Find the answer here.