This grouping covers the 8 ecoregions in the major habitat type of Xeric Shrublands/Deserts. They are all in western and southwestern US and include steppe, desert, and mezquital ecoregions.
ecoregionbirding.info
This grouping covers the 8 ecoregions in the major habitat type of Xeric Shrublands/Deserts. They are all in western and southwestern US and include steppe, desert, and mezquital ecoregions.