Mount Thielsen - Ecology

Ecology

A grove of enormous incense cedars has established itself near Diamond Lake, and there is a forest of ponderosa pine at the nearby Emile Big Tree Trail. Umpqua National Forest features swordferns and Douglas firs. In Fremont-Winema National Forest Rocky Mountain elks, pronghorns, and mule deer, bobcats, black bears, and mountain lions are found. The forest's rivers support populations of trout and the lakes contain fish such as the large-mouth bass. The forest is inhabited by avian species such as mallards, American Bald Eagles, Canada Geese, Whistling Swans. Peregrine Falcons and Warner Suckers are also known to infrequently enter its boundaries.

The lower slopes of Mount Thielsen are heavily forested, with a low diversity of plant species. A forest of mountain hemlock and fir grows up to the timberline at about 7,200 feet (2,200 m). Near the peak of the volcano, Whitebark Pine alone predominates.