The Mediterranean house gecko (Hemidactylus turcicus) is a type of house gecko common to the Mediterranean area which has spread to many parts of the world. It is commonly referred to as the Turkish gecko[1] as represented in its Latin name and also as the moon lizard because it emerges in the evening.[citation needed]
A study in Portugal found H. turcicus to be totally nocturnal, with the highest activity peak around 2:00 AM.[2] They are insectivorous, rarely exceeding 15 centimetres (5.9 in) in length, have large, lidless eyes with elliptical pupils, and purple - or tan-colored skin with black spots, often with stripes on the tail. Their bellies or undersides are somewhat translucent. It is currently unknown what impact the geckos have on native wildlife in the regions they have been introduced to.[3]
In many parts of the world the range of H. turcicus is increasing,[1] and unlike many other reptiles, they appear to be highly resistant to pesticides. The increase may be explained as a consequence of having few predators in places where they have been introduced, and also of their tendency to take shelter in the cracks and unseen areas of human homes, for example inside walls. Reliance on human habitation has thus contributed to their proliferation, similar to rodents. In some Eastern Mediterranean countries such as Turkey and Cyprus it is a taboo to harm them due to their benign nature and they are often kept as house pets.
Description
Snout rounded, about as long as the distance between the eye and the ear opening, 1.25 to 1.3 the diameter of the orbit; forehead slightly concave; ear-opening oval, oblique, nearly half the diameter of the eye. Body and limbs moderate. Digits variable in length, the inner always well developed; 6 to 8 lamellae under the inner digits, 8 to 10 under the fourth finger, and 9 to 11 under the fourth toe. Head with large granules anteriorly, posteriorly with minute granules intermixed with round tubercles. Rostrum four-sided, not twice as broad as deep, with medial cleft above; nostril pierced between the rostrum, the first labial, and three nasals; 7 to 10 upper and 6 to 8 lower labials; mental large, triangular, at least twice as long as the adjacent labials, its point between two large chin-shields, which may be in contact behind it; a smaller chin shield on each side of the larger pair. Upper surface of body covered with minute granules intermixed with large tubercles, generally larger than the spaces between them, suboval, trihedral, and arranged in 14 or 16 pretty, regular longitudinal series. Abdominal scales small, smooth, roundish-hexagonal, imbricate. Males with a short angular series of 4 to 10 (exceptionally 2) preanal pores. Tail cylindrical, slightly depressed, tapering, covered above with minute scales and transverse series of large keeled tubercles, beneath with a series of large transversely dilated plates. Light brown or grayish above, spotted with darker; many of the tubercles white, lower surfaces white.[4] They may be completely translucent except for the spotting. Some are darker. They often seek darkness when fleeing. They may be seen singularly or in a group ranging from 2 to 5 together.
Geographic distribution
Native to the Mediterranean region, the "Med gecko" is one of the most successful species of geckos in the world. It has spread over much of the world and established stable populations far from its origins; it holds no threatened or endangered status. It can be found in countries with Mediterranean climates,[5] such as Portugal, Spain, France, Italy (including Lampedusa Island, Elba), Israel, Albania, Greece, Malta, North Macedonia, coastal Croatia (except western Istria), the Czech Republic (only the warm parts of Moravia and Czech Silesia), Bosnia and Herzegovina, the Adriatic islands, coastal Montenegro, the coastal part of Albania, Cyprus, Turkey, northern Morocco, Algeria, Tunisia, Jordan, Syria, Libya, Egypt, Lebanon, northern Yemen (the Socotra Archipelago), Somalia, Eritrea, Kenya, southern Iran, Iraq, Oman, Qatar, Pakistan, India, the Balearic Islands (Island Addaya Grande), the Canary Islands (introduced to Gran Canaria and Tenerife), Panama, Puerto Rico, Belize, and Cuba.
In Mexico, introductions are known from the states of Tamaulipas, Veracruz, Tabasco, Campeche, Yucatán,[6] Baja California,[7] Chihuahua, Coahuila, Sonora,[8] Durango,[9] and Nuevo León.[10] Introductions are also known from across the Southern U.S., where it is particularly well-established in the Gulf Coast states, including Alabama, Arizona, Arkansas, California,[5] Florida, Georgia, Kansas, Kentucky, Louisiana, Maryland, Mississippi, Missouri, Nevada, New Mexico, North Carolina, Ohio, Oklahoma, South Carolina, Texas, and Virginia.[7][11] It can also be occasionally found as far north as Tennessee and Utah.[citation needed].
Behaviour
Mediterranean house geckoes emit a distinctive, high-pitched call somewhat like a squeak or the chirp of a bird, possibly expressing a territorial message. They are voracious predators on moths and small roaches, and are attracted to outdoor lights in search of these prey. They are also attracted by the call of a male decorated cricket (Gryllodes supplicans) even though the males are usually safely out of reach in a burrow, because female crickets attracted to the male's call can be intercepted and eaten.[12]
Hemidactylus turcicus
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