The Vaux’s Swift (Chaetura vauxi) is a neotropical migrant that visits the Pacific Northwest long enough to nest and then returns to warmer climates for the winter. The interest in this species is two-fold. First, in the eastern United States neotropical migrants have undergone a general population decline that may be related to deforestation, habitat degradation, and forest fragmentation. Because the Vaux’s Swift nests primarily in large hollow trees (Taylor 1905, Baldwin and Zaczkowski 1963, Bull and Cooper 1991), it could be affected by these factors. Second, in the Washington Cascade Range this species seems to be associated with old growth in Douglas-fir (Pseudotsuga menziesii) forests (Manuwal and Huff 1987), which is rapidly being logged. Our objective in this study was to determine if Vaux’s Swifts are positively associated with old-growth forests in northeastern Oregon.