The Northern Great Plains provides some of the most important and intact breeding habitat for grassland birds, some of which are experiencing population declines of 70% or more. Approximately 53% of the global populations of Lark Bunting and 25% of the global populations of Chestnut-collared Longspur breed in the Northern Great Plains. The region also supports significant breeding populations of other declining grassland birds, such as Thick-billed Longspur, Baird’s Sparrow, Sprague’s Pipit, and Mountain Plover. The sagebrush-grasslands of the Northern Great Plains provide the eastern edge of Greater Sage-grouse habitat. Conservation of this region is critically important for preventing range constriction for sage-grouse.