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California ground squirrel (Spermophilus beecheyi) Order: Rodentia Family: Sciuridae. Thirty species of squirrels, chipmunks, and marmots occur in California. Subfamily Sciurinae (tree squirrels and flying squirrels) Humboldt's flying squirrel, Glaucomys oregonensis. San Bernardino flying squirrel, G. o. californicus (CDFW special concern; endemic)
True horns are found mainly among: Ruminant artiodactyls. Antilocapridae ; Bovidae (cattle, goats, antelopes etc.). Giraffidae: Giraffids have a pair of skin covered bony bumps on their heads, called ossicones. Cervidae: Most deer have antlers, which are not true horns due to lacking a bone core and made of keratin.
The forests of Northern California are home to many animals, for instance the American black bear.There are between 25,000 and 35,000 black bears in the state. [6]The forests in northern parts of California have an abundant fauna, which includes for instance the black-tailed deer, black bear, gray fox, North American cougar, bobcat, and Roosevelt elk.
The animal had a sprawling posture as indicated by analysing its shoulder joints. The skull superficially resembles that of Styracocephalus , but the "horns" are formed from different bones; in Estemmenosuchus the horns are located on the frontals and protrude upward, whereas in Styracocephalus the horns are formed by the tabular and extend aft.
The flat-tail horned lizard is named for United States Army Colonel George A. M'Call, [4] who collected the first specimen in California in the 19th century. The species occupies a small range in the Sonoran Desert of southeastern California, southwestern Arizona, and extreme northern Mexico in the Baja California and Sonora states. [2]
The horns of both rams and ewes are composed of a dense layer of keratin covering a core of bone. [6] The Sierra Nevada bighorn sheep's specialized hooves are not only essential for navigating their rocky habitats but also play a crucial role in their mating rituals, where males engage in horn-clashing contests to establish dominance.
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Horned lizards can be distinguished from other lizards by the large pointed scales that protrude from the back of their heads, giving them the appearance of having horns, as well as the flat and broad shape of their bodies. [3] This species of lizard has a distinctive flat body with one row of fringe scales down the sides.