Author(s): Kenneth M Giesen, Thomas J Schoenberg, Clait E Braun
During 1963-80 at least 6,231 sage grouse (Centrocercus urophasianus) (5,147 adults, 1,084 juveniles) were captured and banded in Colorado. Most (5,752) were banded since 1973. Four trapping methods were evaluated for capture efficiency (spotlighting, drive traps, stationary cannon nets, and vehicle-mounted cannon nets) between 1977 and 1980 during which 1,955 grouse were captured. Spotlighting resulted in most captures (1,326; 67.8%) followed by drive trapping (347; 17.7%), vehicle-mounted cannon nets (221; 11.3%), and stationary cannon nets (61; 3.1%). Spotlighting was least selective for age or sex of birds trapped except when trapping on leks. Drive trapping and both methods of cannon-netting were selective for juveniles. Trapping mortality was <1.0% for all trapping methods with injuries most common in drive trapping and cannon-netting.