The entire water composition of the bog thus has been provided by precipitation with no source of surface runoff, since the topography reduces to lower elevations in every direction.

In winter, migrates to lower elevations but generally does not migrate long distances.

Flowing from higher to lower elevations, the glaciers created more than a dozen U-shaped valleys throughout the range.

Alpine birds often move to lower elevations.

With snow increasing in fall and winter they move to lower elevations.

In winter, the mule deer, mountain lion, and coyotes migrate to lower elevations.

In Maine, the trail extends into even harsher environments, and sub-alpine and alpine growth descends to lower elevations.

Although primarily nonmigratory, Mexican Chickadees sometimes fly to lower elevations during the cold of winter.

They usually move to lower elevations in the same area upon onset of winter and move back up to higher elevations in late summer.

They move to lower elevations in winter.