Both coastal and interior grizzlies will feed on insects and grubs when the opportunity arises. Bedding is a common activity throughout the active season. The habitat selected for bedding is often dictated by weather conditions. During periods of warm summer weather, grizzlies will dig deep beds in remnant pockets of snow or in cool, moist sand, usually under a heavy, shady shrub cover. In rainy weather, beds will be located in dry areas, often up against the base of a tree.
Beds can vary from slight scrapes on the ground to deeply excavated pits.
The onset of cold temperatures and falling snow stimulates grizzly bears to enter their dens. Dens are generally located at high elevations in areas of deep snowfall and relatively slow snowmelt. The bed will often be lined with sticks, moss, leaves, and other vegetation, Dens may be located in natural caves, hollows under the roots of trees, or they may be excavated under trees or into the banks of steep slopes. In some areas, bears will congregate during the salmon spawning season to feed. Grizzlies are not true territorial animals.