From: ASSESSMENT OF SPECIES DIVERSITY IN THE MONTANE CORDILLERA ECOZONE
Robber Flies (Insecta: Diptera: Asilidae) Chapter

Big Sagebrush steppe on fine silty soils near Osoyoos in the southern Okanagan valley. Efferia species are predominant in sagebrush steppe in the Montane Cordillera Ecozone. Photo: Rob Cannings.