This Audubon report synthesizes scientific linkages between water and birds in the arid West at a regional scale. It documents the changes that have taken place that threaten the ability of these critical habitats to support healthy populations of birds, focusing on two main geographies: riparian systems of the Colorado River Basin and a network of saline lakes in the Intermountain West. The report complements Audubon's work in the region, by describing key places and species, and establishing relationships between water, habitat, and birds.