''Eirenis modestus'', commonly known as ring-headed dwarf snake or simply the dwarf snake, is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

snake Snakes are elongated, Limbless vertebrate, limbless, carnivore, carnivorous reptiles of the suborder Serpentes . Like all other Squamata, squamates, snakes are ectothermic, amniote vertebrates covered in overlapping Scale (zoology), scales. Ma ...

in the

Colubridae Colubridae (, commonly known as colubrids , from la, coluber, 'snake') is a family of snakes. With 249 genera, it is the largest snake family. The earliest species of the family date back to the Oligocene epoch. Colubrid snakes are found on ever ...

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

. It is native to several Greek islands,

Turkey Turkey ( tr, Türkiye ), officially the Republic of Türkiye ( tr, Türkiye Cumhuriyeti, links=no ), is a list of transcontinental countries, transcontinental country located mainly on the Anatolia, Anatolian Peninsula in Western Asia, with ...

Syria Syria ( ar, سُورِيَا or سُورِيَة, translit=Sūriyā), officially the Syrian Arab Republic ( ar, الجمهورية العربية السورية, al-Jumhūrīyah al-ʻArabīyah as-Sūrīyah), is a Western Asian country loc ...

Armenia Armenia (), , group=pron officially the Republic of Armenia,, is a landlocked country in the Armenian Highlands of Western Asia.The UNbr>classification of world regions places Armenia in Western Asia; the CIA World Factbook , , and ''Ox ...

Azerbaijan Azerbaijan (, ; az, Azərbaycan ), officially the Republic of Azerbaijan, , also sometimes officially called the Azerbaijan Republic is a transcontinental country located at the boundary of Eastern Europe and Western Asia. It is a part of th ...

Israel Israel (; he, יִשְׂרָאֵל, ; ar, إِسْرَائِيل, ), officially the State of Israel ( he, מְדִינַת יִשְׂרָאֵל, label=none, translit=Medīnat Yīsrāʾēl; ), is a country in Western Asia. It is situated ...

Lebanon Lebanon ( , ar, لُبْنَان, translit=lubnān, ), officially the Republic of Lebanon () or the Lebanese Republic, is a country in Western Asia. It is located between Syria to the north and east and Israel to the south, while Cyprus li ...

and southwestern parts of the

Russian Federation Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...

Description

The ring-headed dwarf snake is a pencil-thin species that grows to a maximum length of but most adults are considerably smaller than this. The skin is smooth and the edges of the scales are slightly darker than the centres. The upper surface of the body is a uniform yellowish-brown, greyish-brown or reddish-brown colour and the underparts are glossy white. The top of the head has a large black blotch inside which are either two whitish spots or a pale W-shaped mark. Round the neck is a crescent-shaped band of dark blotches separated from the head by a pale band.

Subspecies

Currently, three subspecies are recognized, namely ''Eirenis modestus modestus'' (MARTIN 1838), ''E. m. semimaculatus'' ( BOETTGER 1876) from central and western Turkey (Anatolia), and ''E. m. cilicius'' (SCHMIDTLER 1993) from southern Turkey.

Distribution and habitat

The ring-headed dwarf snake is native to the Greek Mediterranean islands of Lesbos,

Chios Chios (; el, Χίος, Chíos , traditionally known as Scio in English) is the fifth largest Greek island, situated in the northern Aegean Sea. The island is separated from Turkey by the Chios Strait. Chios is notable for its exports of mastic ...

Samos Samos (, also ; el, Σάμος ) is a Greek island in the eastern Aegean Sea, south of Chios, north of Patmos and the Dodecanese, and off the coast of western Turkey, from which it is separated by the -wide Mycale Strait. It is also a separate ...

, Alzonisi,

Kalymnos Kalymnos ( el, Κάλυμνος) is a Greek island and municipality in the southeastern Aegean Sea. It belongs to the Dodecanese island chain, between the islands of Kos (south, at a distance of ) and Leros (north, at a distance of less than ): t ...

Leros Leros ( el, Λέρος) is a Greek island and municipality in the Dodecanese in the southern Aegean Sea. It lies (171 nautical miles) from Athens's port of Piraeus, from which it can be reached by an 9-hour ferry ride or by a 45-minute flight fr ...

Symi Symi, also transliterated as Syme or Simi ( el, Σύμη), is a Greek island and municipality. It is mountainous and includes the harbor town of Symi and its adjacent upper town Ano Symi, as well as several smaller localities, beaches, and areas o ...

and

Megisti Kastellorizo or Castellorizo (; el, Καστελλόριζο, Kastellórizo), officially Megisti ( ''Megísti''), is a Greek island and municipality of the Dodecanese in the Eastern Mediterranean.Bertarelli, 131 It lies roughly off the south ...

and most of Turkey. Its range extends eastwards into the

Caucasus Mountains The Caucasus Mountains, : pronounced * hy, Կովկասյան լեռներ, : pronounced * az, Qafqaz dağları, pronounced * rus, Кавка́зские го́ры, Kavkázskiye góry, kɐfˈkasːkʲɪje ˈɡorɨ * tr, Kafkas Dağla ...

, eastern Georgia, Armenia and Azerbaijan. Its natural

habitat In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical ...

s are dry

shrub A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees ...

by vegetation, cultivated fields, fallow areas and dry open woodland.

Behaviour

During the day the ring-headed dwarf snake shelters under stones or in crevices, and several snakes may share the same hiding place. It emerges at twilight to hunt for spiders, insects, centipedes, scorpions and small lizards. Breeding takes place in summer when the female lays a clutch of three to eight relatively large eggs. The hatchlings are up to about long.

Status

The ring-headed dwarf snake has a wide range and is presumed to have a large total population. It seems to be an adaptable species able to tolerate a range of different habitat types, and no particular threats have been identified and for these reasons, the

IUCN The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...

has listed it as being of "

Least Concern A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. T ...

References

{{Taxonbar, from=Q1146894 Eirenis Reptiles described in 1838 Reptiles of Turkey Reptiles of Syria Reptiles of Armenia Reptiles of Azerbaijan Reptiles of Russia Taxa named by William Charles Linnaeus Martin