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The addax is a spiral-horned antelope. Male addaxes stand from 105 to 115 cm (41 to 45 in) at the shoulder, with females at 95 to 110 cm (37 to 43 in). They are sexually dimorphic , as the females are smaller than the males. [ 11 ]
Male in the Kruger National Park. The nyala is a spiral-horned and middle-sized antelope, between a bushbuck and a kudu. [16] It is considered the most sexually dimorphic antelope. [2] The nyala is typically between 135–195 cm (53–77 in) in head-and-body length. [2] The male stands up to 110 cm (43 in), the female is up to 90 cm (3.0 ft) tall.
The spiral-horned antelopes belong to the subfamily Bovinae which also includes oxen of the tribe Bovini and two aberrant species of Asian antelope, the four-horned antelope and the nilgai which belong to the tribe Boselaphini. The relationship between the tribes varies in research concerning their phylogeny.
Male lesser kudu. The lesser kudu is a spiral-horned antelope. The head-and-body length is typically between 110 and 140 cm (43 and 55 in). Males reach about 95–105 cm (37–41 in) at the shoulder, while females reach 90–100 cm (35–39 in). Males typically weigh 92–108 kg (203–238 lb) and females 56–70 kg (123–154 lb). [13]
Most of the "spiral-horned" antelope have pale, vertical stripes on their backs. Many desert and semidesert species are particularly pale, some almost silvery or whitish (e.g. Arabian oryx); the beisa and southern oryxes have gray and black pelages with vivid black-and-white faces.
The giant elands are spiral-horned antelopes. Despite its common name, this species broadly overlaps in size with the common eland (Taurotragus oryx). However, the giant eland is somewhat larger on average than the common eland and is thus the largest species of antelope in the world.
Though not an antelope, it is known colloquially in North America as the American antelope, prong buck, pronghorn antelope and prairie antelope, [5] because it closely resembles the antelopes of the Old World and fills a similar ecological niche due to parallel evolution. [6] It is the only surviving member of the family Antilocapridae. [7]
The horns form the first spiral rotation at around 2 years of age, and not reaching the full two and a half rotations until they are 6 years old; occasionally they may even have 3 full turns. [2] The greater kudu is one of the largest species of antelope, being slightly smaller than the bongo. Bulls weigh 190–270 kg (420–600 lb), with a ...