THE USE OF NESTING BOXES TO STUDY THE BIOLOGY OF THE MOUNTAIN CHICKADEE (PARUS GAMBELI) AND ITS IMPACT ON SELECTED FOREST INSECTS11STUDIES ON PREDATION OF DIFFERENT LIFE STAGES OF DOUGLAS-FIR TUSSOCK MOTH WERE SUPPORTED BY THE USDA DOUGLAS-FIR TUSSOCK MOTH EXPANDED RESEARCH AND DEVELOPMENT PROGRAM, FOREST SERVICE, PORTLAND, OREGON, FS-PNW-GRANT NO. 46. PORTIONS OF OTHER STUDIES WERE SUPPORTED BY NATIONAL INSTITUTE OF HEALTH GRANT #CC0283.