Utah State University Extension
Over the last several decades, biologists have grown increasingly concerned about declines in populations of two species of sage-grouse (Centrocercus spp.), a bird whose range covers a vast portion of eleven western U.S. states and two Canadian provinces (Stiver et al. 2006).
Messmer, Terry, "Assessing the Needs of Sage-Grouse Local Working Groups. Final Technical Report" (2009). All Current Publications. Paper 1159.