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.
It is a great day, indeed, when a flock of Evening Grosbeaks descends on the feeder of an unsuspecting birdwatcher. But their ravenous appetite for sunflower seeds quickly gets expensive for the host. The Evening Grosbeak will have to be able to adapt to breeding in new areas if the Audubon climate model’s projection is correct: only two percent of the current summer range is thought to be stable. The decrease in total available climate space is just over one-quarter (29 percent). The winter climate space is predicted to stay mostly the same size but shift by about 58 percent, predominately north and upslope. This is another highly irruptive and unpredictable species, so further data will help strengthen model predictions.