The Oregon red tree vole is only found in coastal Oregon and Northern California, but not north of the Columbia River.  It builds its nest out of Douglas-fir needles and twigs in the mid- to upper-canopy of Douglas fir trees. Oregon tree voles are one of the most specialized tree-dwelling organisms in the world.  They feed primarily on the needles of Douglas fir trees and to a lesser extent on the soft bark or pithy center of a small twig. It has been estimated that a single tree vole can eat an average of 100 Douglas-fir needles per hour.  Tree voles obtain their water from their food and from licking dewdrops off of the tree’s needles.  Oregon tree voles are an important food source for raccoons, weasels, martens, and various other owl species.  The Northern spotted owl is their most dangerous predator.