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).