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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.
Unlike horns which are more permanent, deer shed their antlers and grow new ones annually. Male reindeer, known as bulls, shed their antlers in November, just before Christmas, and grow them back ...
In contrast to antlers, horns—found on pronghorns and bovids, such as sheep, goats, bison and cattle—are two-part structures that usually do not shed. A horn's interior of bone is covered by an exterior sheath made of keratin [7] (the same material as human fingernails and toenails). Antlers are usually found only on males.
Male antlers grow more branching points and measure anywhere between 39 inches and 53 inches in beam length, whereas female antlers only measure about 20 inches and generally have a simpler structure.
The horns also make the animals a prized game trophy, which has led to the near-extinction of the two northern species. As an introduced species Between 1969 and 1977, the New Mexico Department of Game and Fish in the US intentionally released 95 gemsbok into its state's White Sands Missile Range [ 16 ] and that population is now estimated ...
The horns, which are found on both males and females, have two to three twists and are typically 55 to 80 cm (22 to 31 in) in females and 70 to 85 cm (28 to 33 in) in males, although the maximum recorded length is 109.2 cm (43.0 in). [4] The lower and middle portions of the horns are marked with a series of 30 to 35 ring-shaped ridges. [4]
Unlike antlers, horns are permanent and not seasonally shed. Another distinguishing factor from bone and antler is the fine parallel lines that are present on the surface of the horn. Horn comes in a great variety of sizes and colors, including white, green, red, brown, and black.
The longer pair of straight, spike-like horns is atop its head between the ears, while the other, shorter pair is on the forehead; its posterior horns are always longer than the anterior horns, which may even present as merely fur-covered "studs". While the posterior horns measure 8–12 cm (3.1–4.7 in), the anterior ones are usually 2–5 cm ...