Douglas fir Douglas-fir forest is the primary habitat of the red tree vole ("Arborimus longicaudus") and the spotted owl ("Strix occidentalis"). Home range requirements for breeding pairs of spotted owls are at least 400 ha () of old growth. Red tree voles may also be found in immature forests if Douglas-fir is a significant component. The red vole nests almost exclusively in the foliage of the trees, typically above the ground, and its diet consists chiefly of Douglas-fir needles. A parasitic plant sometimes utilizing "P. menziesii" is Douglas-fir dwarf mistletoe ("Arceuthobium douglasii"). The leaves are also used by the woolly conifer aphid
Douglas Fraser his father, who worked at a brewery, would sometimes fuel the family stove with stolen whiskey. Samuel Fraser moved to Detroit, Michigan, while his son was still a young boy, in 1922. Samuel, his mother, Douglas, his sister, and his brother sailed to New York City aboard the and were inspected at Ellis Island on April 23, 1923. They travelled to their new home in Detroit by train. Douglas was deeply influenced by the Great Depression. His father was out of work for long periods, and he admitted that the poverty and social disorder that he witnessed changed his life.