Gazella

A gazelle is any of many antelope species in the genus Gazella or formerly considered to belong to it. Six species are included in two genera, Eudorcas and Nanger, which were formerly considered subgenera. The genus Procapra has also been considered a subgenus of Gazella, and its members are also referred to as gazelles, though they are not dealt with in this article.Gazelles are known as swift animals.

 

 Some are able to run at bursts as high as 100 km/h (60 mph) or run at a sustained speed of 50 km/h (30 mph). Gazelles are found mostly in the deserts, grasslands, and savannas of Africa; but they are also found in southwest and central Asia and the Indian subcontinent. They tend to live in herds, and eat less coarse, easily digestible plants and leaves.Gazelles are rather small antelopes, most standing 60–110 cm (2–3.5 ft) high at the shoulder, and are generally fawn-colored.The gazelle genera are Gazella, Educratria, and Nanger. The taxonomy of these genera is a confused one, and the classification of species and subspecies has been an unsettled issue. Currently, the genus Gazella is widely considered to contain about 13 species.Four further species are extinct: the red gazelle, the Arabian gazelle, the Queen of Sheba's gazelle, and the Saudi gazelle. Most surviving gazelle species are considered threatened to varying degrees. Closely related to the true gazelles are the Tibetan and Mongolian gazelles (species of the genus Procapra), the blackbuckof Asia, and the African springbok. The Arabian gazelle (Gazella arabica) is a species of gazelle known from the Arabian Peninsula. Until recently, it was only known from a single lectotype specimen mistakenly thought to have been collected on the Farasan Islands in the Red Sea in 1825.

A 2013 genetic study of the lectotype specimen revealed that skull and skin do not stem from the same individual but belong to two distinct lineages of the mountain gazelle (Gazella gazella), necessitating restriction of the lectotype to the skin to conserve nomenclatural stability. A later study formalized the use of Gazella arabica for the Arabian lineage of the mountain gazelle, and synonymized Gazella erlangeri with G. arabica. One widely familiar gazelle is the African species Thomson's gazelle (Eudorcas thomsoni), which is around 60 to 80 cm (24 to 31 in) in height at the shoulder and is coloured brown and white with a distinguishing black stripe. 
The males have long, often curved, horns. Like many other prey species, Tommies and springboks (as they are familiarly called) exhibit a distinctive behaviour of stotting (running and jumping high before fleeing) when they are threatened by predators, such asFossils of genus Gazella are found in Pliocene and Pleistocene deposits of Eurasia and Africa. The tiny Gazella borbonica is one of the earliest European gazelles, characterized by its small size and short legs. Gazelles disappeared from Europe at the start of Ice Age, but they survived in Africa and Middle East. Three species became extinct in recent times due to human causes. response to foraging conditions). In general, seasonal movements are likely to exhibit a strong elevational component, whereby lower, forested elevations are used during the spring-summer (security cover effects) to access lower elevation mineral licks, and during winter (thermal cover effects) to access forage. The farthest movements are expected to be by dispersing mountain goats. Such movements are likely to involve mountain goats crossing forested valleys as they move between mountain blocks..