Grouse and Land-Based Wind Energy Development in the United States
Several species of grouse occupy prairie and sagebrush habitat across the western United States. Sharp-tailed grouse (Tympanuchus phasianellus), greater prairie chicken (Tympanuchus cupido), and lesser prairie-chicken (Tympanuchus pallidicinctus) reside in the grassland prairies of the Great Plains. In the Intermountain West, greater sage-grouse (Centrocercus urophasianus) and Gunnison sage-grouse (Centrocercus minimus) inhabit the expansive sagebrush plains (Johnsgard 2008). During the mating season, male grouse perform elaborate courtship displays in communal breeding areas known as leks. These areas are often used each year and tend to be large, open patches of land with minimal vegetation, offering greater visibility for males (Connelly et al. 2011). Female grouse create nests on the ground under sagebrush or within clumps of grass. Females can lay between 5 and 15 eggs depending on the species. Once hatched, chicks consume mostly insects, but shift their diets to primarily eat vegetation as they become adults (www.allaboutbirds.org/guide/). These grouse species require extensive, intact native habitats to complete their life cycle (Pruett et al. 2009a; Rowland et al. 2006; Sandercock et al. 2011; Wisdom et al. 2011). Given the close connection between grouse and their habitat, they are considered indicator species, or species whose presence indicates ecosystem health (Carlisle et al. 2018; Rowland et al. 2006).
Disturbance and alteration of habitat can result in abandonment of breeding and nesting grounds or delayed reproduction. Multiple stressors on grouse have resulted in population declines across their range. Stressors include conversion of natural habitat, climate change, spread of invasive species, and land use change including energy development (Garton et al. 2011; Hovick et al. 2014; LeBeau et al. 2020a; Schroeder et al. 2000; Wilsey et al. 2019).
In 2014, the U.S. Fish and Wildlife Service listed the Gunnison sage-grouse as threatened, and in 2022, the agency listed the southern distinct population segment and the northern Male greater sage-grouse displaying at a lek (gathering of males) in Wyoming. Photo from LuRay Parker, Wyoming Game and Fish, National Renewable Energy Laboratory (NREL) 20649 Grouse and Land-Based Wind Energy Development in the United States | 2 distinct population segment of the lesser prairie-chicken as endangered and threatened, respectively. Conservation status for each species varies from state to state. In addition, several species of grouse are listed on the International Union for Conservation of Nature’s Red List of Threatened Species.