NEST SITE SELECTION, NEST SUCCESS, AND DENSITY OF SELECTED CAVITY-NESTING BIRDS IN NORTHEASTERN OREGON WITH A METHOD FOR IMPROVING THE ACCURACY OF DENSITY ESTIMATES A Thesis Presented in Partial Fulfillment of the Requirements for the Degree of Master of Science With a Major in Wildlife Resources In the College of Graduate Studies UNIVERSITY OF IDAHO By Nicole Nielsen-Pincus February 22, 2005 Major Professor: Edward O. Garton, Ph.D.