11/12/2014
That hoo, hoo, hoo you are hearing at night is part of the Great Horned Owl mating ritual. They choose their mates this month (November) and begin nesting in December! Here's a little more information on the type of Great Horned Owl in our neighborhood.
Californian great horned owl, Bubo virginianus pacificus (Cassin, 1854)
Central and southern California west of the Sierra Nevada except San Joaquin Valley, south to Northwestern Baja California, Mexico. Intergrades with pallescens in San Diego County, California (see also below). Resident all-year.[10]
Very rich brown, dark underside barring distinct but less pronounced than in saturatus but more pronounced than in pallescens. Humeral area is black. Feet are mottled dark. The facial disc is often even darkly mottled.[10] This is a fairly small-bodied race, in fact including the lightest wild great horned owl adult ever weighed. The wing chord length is 305–362 mm (12.0–14.3 in), averaging 332.5 mm (13.09 in), in males and 335–375 mm (13.2–14.8 in), averaging 351.4 mm (13.83 in), in females. Body mass ranges from 680 to 1,272 g (1.499 to 2.804 lb), averaging 991.7 g (2.186 lb), in males and from 825 to 1,668 g (1.819 to 3.677 lb), averaging 1,312.7 g (2.894 lb), in females. Tail length is 175 to 218 mm (6.9 to 8.6 in) and 203 to 230 mm (8.0 to 9.1 in) in males and females, respectively. Bill length is 34 to 41 mm (1.3 to 1.6 in) and one bird had a tarsus of 57 mm (2.2 in).[5][8][13][16]
http://en.wikipedia.org/wiki/Great_horned_owl
The great horned owl (Bubo virginianus), also known as the tiger owl (originally derived from early naturalists' description as the "winged tiger" or "tiger of the air") or the hoot owl,[2] is a large owl native to the Americas. It is an extremely adaptable bird with a vast range and is the most wid…