Timon nevadensis, the Sierra Nevada lizard, is a species of lizard in the family Lacertidae. It is endemic to Spain. It is sometimes considered a subspecies of the ocellated lizard.
Formerly, Timon nevadensis had been regarded as subspecies of Timon lepidus but it has been put into species rank in 2013. Its distribution range is limited to the Sierra Nevada and the Spanish east coast, reaching the Alicante Province in the north.
This is a robust and large reptile (up to 65 cm of total head-tail length, sometimes even 80-90 cm). The head is large and very distinct from the body. Like all the saurians, it has four legs that in this species are large and well developed. The eyelids are mobile (this character in addition to its legs, distinguishes a saurian from an ophidian). The body's colour is showy. Although the general tone can be perceived as greenish, the back is covered with yellow and black scales, as well as blue ones on the sides, generally forming ocelli (rounded spots). This ocelli profusion on the animal's body gives name to the species. The belly usually has a uniform tone: whitish, grey or yellowish. Young specimens are very striking because they exhibit a dozen rows of yellowish ocelli surrounded by a dark shade on a greyish, brown or greenish background.
This species is indifferent in terms of habitat. It uses both scrub and forest areas, as well as agricultural land. It is common in open areas, with little vegetative cover and abundant shelter availability (large loose stones, stone heaps, stone walls, tree-holes, etc ...). It can also be present in parks and gardens of towns and small cities, where it climbs trees.
The ocellated lizards are diurnal, although in summer they can have some nocturnal activity avoiding the hot central hours of the day. It hibernates during the coldest months of the year, although it is possible to observe them on the sunny days of autumn and winter. It is a lone and unsociable reptile, which only mates briefly at the copulation moment and only after a somewhat violent approach to his partner. It is very agile and fast racing, being able to climb big trees very quickly. It is very distrustful and flees as soon as it feels threatened. Its diet mainly consists of insects, although it can prey on other smaller reptiles, amphibians, chickens and bird eggs, as well as on small mammals (rodents) and their offspring. They do not waste carrion and also consume wild fruits. Unlike other lizards, ocellated lizards actively search for their prey and hunt. Its bite, if handled, can be painful due to its great mandibular power.
The lizards come into heat in spring; at this moment, the males are very territorial and aggressive with other specimens, driving them out from their territories. When a female enters a male's territory, a kind of harassment situation happens (persecution and biting) to get the female to surrender and impede its escape until she agrees to copulate. Two or three months later the female deposits between 5 and 20 eggs in a small tunnel which she has dug in the ground. In summer, small lizards hatch and become sexually mature by the third year of life, after reaching thrice the size they were when they hatched.
The Sierra Nevada Ocellated Lizard is an impressive but terribly shy Lacertid. In particular, adult specimens may have flight distances of more than 20 meters. These lizards occur in high altitude mountain areas as well as in coastal dunes and agricultural land.
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