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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.
A rhinoceros (/ r aɪ ˈ n ɒ s ər ə s / ry-NOSS-ə-rəss; from Ancient Greek ῥινόκερως (rhinókerōs) ' nose-horned '; from ῥίς (rhis) ' nose ' and κέρας (kéras) ' horn '; [1] pl.: rhinoceros or rhinoceroses), commonly abbreviated to rhino, is a member of any of the five extant species (or numerous extinct species) of odd-toed ungulates (perissodactyls) in the family ...
In captive animals, the horn is frequently worn down to a thick knob. [14] The Indian rhino's single horn is present in both bulls and cows, but not on newborn calves. The horn is pure keratin, like human fingernails, and starts to show after about six years. In most adults, the horn reaches a length of about 25 cm (9.8 in), but has been ...
The animal is always in profile on Indus seals, but the theory that it represents animals with two horns, one hiding the other, is disproved by a (much smaller) number of small terracotta unicorns, probably toys, and the profile depictions of bulls, where both horns are clearly shown. It is thought that the unicorn was the symbol of a powerful ...
The narwhal was scientifically described by Carl Linnaeus in his 1758 publication Systema Naturae. [5] The word "narwhal" comes from the Old Norse nárhval, meaning 'corpse-whale', which possibly refers to the animal's grey, mottled skin and its habit of remaining motionless when at the water's surface, a behaviour known as "logging" that usually happens in the summer.
It derives from the Greek word μονόκερως (monokerōs), a compound word from μόνος (monos) which means "only one" / "single" and κέρας (keras) (neuter gender), which means "horn". The monoceros was first described in Pliny the Elder 's Natural History as a creature with the body of a horse , the head of a stag (minus the ...
Genetic analysis of dung samples collected in Cat Tien National Park in a survey from October 2009 to March 2010 showed only a single individual Javan rhinoceros remained in the park. In early May 2010, the body of a Javan rhino was found in the park. The animal had been shot and its horn removed by poachers. [58]
Most mammals with tusks have a pair of them growing out from either side of the mouth. Tusks are generally curved and have a smooth, continuous surface. The male narwhal's straight single helical tusk, which usually grows out from the left of the mouth, is an exception to the typical features of tusks described above. Continuous growth of tusks ...