Quercus kelloggii – The California black oak, also known as Kellogg oak, is an oak in the red oak section native to western North America. California black oak is a deciduous tree growing in mixed evergreen forests, oak woodlands, and coniferous forests. California black oak is distributed along foothills and lower mountains of California and western Oregon. The tree can grow in many types of soils, but it is important that the soil be well-drained. Quercus kelloggii typically grows from 9–25 m (30–82 ft) in height and from 0.3–1.4 m (0.98–4.59 ft) in diameter. Large trees may exceed 36 m (118 ft) in height and 1.6 m (5.2 ft) diameter. The species also grows in shrubby scrub-oak form on poor sites. While individual trees generally have a lifespan between 100 and 200 years, California black oak can live up to 500 years of age. The California black oak is a critical species for wildlife. Cavities in the trees provide den or nest sites for owls, various woodpeckers, tree squirrels, and American black bears. Trees provide valuable shade for wildlife during the hot summer months. California black oak forest types are heavily used for spring, summer, and fall cover by black bear. Acorns are heavily utilized by livestock, mule deer, feral pigs, rodents, mountain quail, Steller’s jay, and woodpeckers (Wikipedia).