aData includes only weeks in which a species or group was detected such that no 0 values were included. Mean ± 1 standard deviation.
b Northern saw-whet owl (n = 20), Western screech owl (n = 9), Northern pygmy owl (n = 9), Unidentified small owl (n = 17)
Tree vole activity (i.e., the number of detections per week at nest platforms with detections) the week following detection of weasels decreased dramatically compared to weeks prior to weasel detection (Fig. 3a). With detections of other potential nest predators, tree vole activity was constant 12 weeks before and after a detection with lower variance for flying squirrels which were detected much more frequently than birds digging or owls (Fig. 3).