One of the oldest rites of Spring is the migration of cranes from their southern wintering grounds to nesting areas in the north. America's largest population of Sandhill Cranes migrates up the Rocky Mountains from Mexico to Montana, and on the way they take a long break in southern California's San Luis Valley where they rest, feed and court before continuing their journey. Becky Rumsey took in the sight at the Monte Vista National Wildlife Refuge and sent us this report.