It's called pareidolia, a psychological phenomenon wherein the mind perceives a familiar pattern of something where none actually exists.
What do you see?
Emory Oak, Quercus emoryi is an evergreen tree in the red oak group, retaining its leaves through the winter until the new leaves are produced in spring, and is a large shrub or small tree from 5–17 meters (17-57 feet) tall. The leaves are 3–6 cm (1.2-2.4 inches) long, entire or wavy-toothed, leathery, dark green above, paler below. The acorns are 1.5–2 cm (0.6-0.8 inch) long, blackish-brown, and mature in 6–8 months from pollination; the kernel is sweet, and is an important food for many mammals and birds.Wikipedia