17
Figure 3: All grizzly bear installations for 2018 were located within the North Cascades National Park.
volunteers in the past have led to more careful thought on placement and team commitment prior to some
camera installations. For 2018, limited effort was focused on camera traps set to detect grizzly bears in the North
Cascades Complex: three installations, 549 trap nights and five percent or our total effort (Table 2, Figure 2).
Table 2. Grizzly bear survey area information, including duration of monitoring and number of installations.
Grizzly Bear Camera Survey Areas 2018
Survey Area General Region
# of
Installations
Installation
Date Removal Date
Total Trap
Nights Lure
Baker River NCNP 2 2017/09/03 2018/09/29 492 Grizzly Bear
Thornton Lake NCNP 1 2015/09/09 2015/11/05** 57 Grizzly Bear
Five species were detected at Baker River: wolverine, black bear, coyote, mule deer, snowshoe hare and smaller
mammals (Table 3). The wolverine detection, during the winter at 1,230-ft elevation, is significantly lower than
where camera traps are usually set for wolverines. Our camera at Thornton Lake was installed in 2015 and
retrieved during the summer of 2018, and had recorded data for 57 days and detected one species--mule deer--
before malfunction associated with high snow levels buried the camera.
