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
Knagenhjelm (noble family) Manor ("Kaupanger Hovedgård") in Sogn og Fjordane and are included in the Yearbook of the Danish Nobility ("Danmarks Adels Aarbog"). Before he became noble, Niels Tygesen Knag had only a tree trunk as his arms (Hans Krag. 1942). The coat of arms was received upon the ennoblement in 1721. Description without the heraldic terminology: "On a blue shield a tilted, chopped and knotty silver tree trunk beside or above which there are three golden stars in each of two bends. On the helmet is a six-pointed star between two buffalo horns divided in gold and blue, vice versa, respectively." Some