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Telescopus
	T. semiannulatus in an acacia, central Tanzania
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Suborder:	Serpentes
Family:	Colubridae
Subfamily:	Colubrinae
Genus:	Telescopus; Wagler, 1830
Type species
	T. fallax; Fleischmann, 1831
Synonyms
	Tarbophis Fleischmann, 1831;

Telescopus, the Old World catsnakes, is a genus of 12 species of mildly venomous opisthoglyphous snakes in the family Colubridae.

Geographic range

Species of the genus Telescopus are found from the Balkans and Pakistan through to southern and western Africa, plus two species in northern Eurasia.

Description

The genus Telescopus is characterised by having a slender slightly flattened cylindrical body and attaining a total length (including tail) of between 80–180 cm (about 2.5–6 feet). They have medium-large eyes with vertical pupils, a typical feature of nocturnal reptiles, and have smooth dorsal scales. The dentition of the genus is as follows; typically 10–12 maxillary teeth, with a space before a pair of grooved fangs at the rear of the mouth, approximately level with the eyes. The anterior mandibular teeth are usually longer than the posterior mandibular teeth, perhaps to aid the arboreal species in catching and holding prey whilst in trees. The species are mostly drab, spotted snakes, but include the spectacular tiger snake (T. semiannulatus), which is orange in color with black saddles along its back.^[1]

Habitat and Behaviour

The genus Telescopus includes both arboreal and terrestrial species, and can be found from sea level up to 2,000 metres (about 6,600 feet) above sea level. They are nocturnal hunting snakes with a distinct head and large eyes.

Diet

The primary prey species of Telescopus are small lizards, including geckos, although some members of the genus may occasionally prey on small birds, rodents and amphibians.

Reproduction

All species in the genus Telescopus are oviparous, laying clutches of 5–15 eggs.

Venom

All species in the genus Telescopus are venomous, with the venom being of a neurotoxic nature; however, they are not considered particularly harmful to man. This is because the opisthoglyphous venom-delivery system is not as efficient as the delivery systems found in Elapidae and Viperidae. However, some members of the genus Telescopus such as T. dhara have particularly large venom glands, and the venom toxicity in some species has been compared to that of the Acanthophis species. For these reasons, it is advisable that all Telescopus species be handled with caution. It is also important to consider that allergic reactions are possible after a bite, and such reactions would significantly worsen the effects of an envenomation.

Species

Telescopus beetzi (Barbour, 1922) – Beetz's tiger snake, Karoo tiger snake, Namib tiger snake
Telescopus dhara (Forskål, 1775) – Arabian cat snake, large-eyed cat snake, Israeli cat snake
Telescopus fallax (Fleischmann, 1831) – European cat snake, Mediterranean cat snake
Telescopus finkeldeyi Haacke, 2013 – Damara tiger snake
Telescopus gezirae Broadley, 1994 - Blue Nile cat snake
Telescopus hoogstraali K.P. Schmidt & Marx, 1956
Telescopus nigriceps (Ahl, 1924) - black-headed snake
Telescopus obtusus (Reuss, 1834) – Egyptian cat snake
Telescopus pulcher (Scortecci, 1935) - beautiful cat snake
Telescopus rhinopoma (Blanford, 1874) - Indian desert tiger snake
Telescopus semiannulatus A. Smith, 1849 - common tiger snake, tiger cat snake, western tiger snake, eastern tiger snake
Telescopus tessellatus (Wall, 1908) – Soosan tiger snake
Telescopus tripolitanus (F. Werner, 1908)
Telescopus variegatus (J.T. Reinhardt, 1843) - variable cat snake

Nota bene: A binomial authority in parentheses indicates that the species was originally described in a genus other than Telescopus.

References

^ Boulenger GA (1896). Catalogue of the Snakes in the British Museum (Natural History). Volume III., Containing the Colubridæ (Opisthoglyphæ and Proteroglyphæ), .... London: Trustees of the British Museum. (Taylor and Francis, printers). xiv + 727 pp. + Plates I- XXV. (Genus Tarbophis, p. 47).

External links

Crochet P-A, Rasmussen JB, Wilms T, Geniez P, Trape J-F, Böhme W (2008). "Systematic status and correct nomen of the western North African cat snake: Telescopus tripolitanus (Werner, 1909) (Serpentes: Colubridae), with comments on the other taxa in the dhara-obtusus group". Zootaxa 1703: 25-46.(Abstract)