Scorching heat waves, severe cold snaps and other extreme weather events are limiting where species can exist—and affecting biodiversity estimates—for more than 500 North American bird species, according to a new, Yale–led study. The issue is particularly acute in the Great Plains and southwes tern regions of the United States, where species ranges and total species counts are significantly overestimated when variable and extreme weather are not considered, the study says. ...read more read less