Сахара тікенді құйрықты кесірткесі

Species of lizard

Saara hardwickii, commonly known as Hardwicke's spiny tailed lizard or the Indian spiny tailed lizard is a species of lizard in the family Agamidae. The species is found in patches across the Thar desert, Kutch, and surrounding arid zones in India and Pakistan. It is mainly herbivorous and lives in numbers in some areas. Since it is found in loose clusters it often attracts predators such as raptors. It is also hunted by local peoples in the belief that the fat extracted from it is an aphrodisiac.

Traditionally the species S. hardwickii was placed in the genus Uromastyx, but in 2009 it was moved to the genus Saara together with the closely related species S. asmussi and S. loricata. The specific name, hardwickii, commemorates English naturalist Thomas Hardwicke who brought illustrations of the species from which J. E. Gray described it. It has been suggested that Uromastyx sensu lato along with the sister group of Leiolepis may be considered as a distinct family, the Uromastycidae, however this is not widely accepted as the rest of the Agamidae do not form a clear sister group.

The type locality for S. hardwickii is Kanauj district in Uttar Pradesh. It inhabits the dry desert tracts of the northern half of the plains of India into Pakistan. It ranges from Uttar Pradesh in the east to Rajasthan in the West and the Kachchh area of Gujarat. The hot Thar desert is the stronghold of this species and are found extensively in the Jaisalmer, Bikaner, Barmer and Churu districts in Rajasthan. It is also found in some parts of Madhya Pradesh (Rewa).

Hardwicke's spiny tailed lizard has a rounded head with a flat snout. It is usually yellowish brown, sandy or olive in colour. It may have black spots and vermiculations and a distinctive black spot on the front of the thigh. It has a dorso ventrally flattened body with wrinkled skin. Its tail has whorls of spiny scales with large spines on the side. The tail is bluish grey (in Jaisalmer) to sand coloured (in Kutch). The colour of the lizard varies and darker colours are seen during the colder seasons.

Generally found in firm ground habitats rather than pure sand dunes, but the tawny eagle (Aquila rapax) and other falcons such as the laggar (Falco jugger) also prey on these lizards. The cattle egret has also been known to prey on it.

Hardwicke's spiny tailed lizard excavates a sloping zig zagging or spiralling tunnel of diameter and over long for itself. The tunnel has an entrance which is flush with the ground and ends in a small chamber. S. hardwickii is solitary in the burrow, but hatchlings may stay with the mother initially.

Hardwicke's spiny tailed lizard is largely herbivorous and its teeth are adapted for a plant diet which comprises the flowers and fruits of the kair (Capparis aphylla); the beans of khejri (Prosopis spicigera); the fruit of Salvadora persica, and grass. In locust breeding areas the spiny tailed lizard has been known to feed on nymphs and adults of the locust. In summer it tends to forage more in the mornings feeding to a greater extent on insects, and in the monsoons it feeds principally on herbs and grasses. The fat stored in the tail of the lizard is purported to have medicinal properties and for this reason, this lizard is often illegally collected and sold in various parts of India and Pakistan for folk medicine. It is kept in captivity by the cruel practice of dislocating the backbone.

Hardwicke's spiny tailed lizard is on the verge of extinction in western Rajasthan due to rampant poaching by nomads, who value this reptile both for its meat and as a medicine. During the monsoon, this lizard leaves its burrow and comes out to feed on tender shoots of grass, at which time it falls prey to raptors.