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 geographically variable vireo is attracted to scrubby thickets everywhere it occurs. Three distinctive populations are all of current management concern: the range-restricted “Least” Bell’s Vireo of coastal chaparral in southern California, the “Arizona” Bell’s Vireo of desert waterways, and a more widespread Midwestern subspecies. If Audubon's climate model predictions come true, Bell’s Vireos could be substantially more widespread by century’s end. It is important to note that most of the projected gains appear to involve the Midwestern population, currently of least concern. The two southwestern subspecies will continue to benefit from aggressive habitat protection and perhaps cowbird control.
Are the projected range maps different from the range maps in field guides? Find the answer here.