Ahaetulla dispar

Ahaetulla dispar, the Gunther's vine snake, is a species of tree snake endemic to the Western Ghats. It is primarily restricted to the Shola forests of the Southern Western Ghats where it is found often on high-elevation montane grasslands and the low shrub belts.

Gunther's vine snake

Near Threatened  (IUCN 3.1)[1]
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Colubridae
Genus: Ahaetulla
Species:
A. dispar
Binomial name
Ahaetulla dispar
(Günther, 1864)
Synonyms
  • Dryophis dispar
  • Tragops dispar
Head

Description

Snout pointed and projecting, without dermal appendage, not quite twice as long as the eye. Internasals and prefrontals usually in contact with the labials; one or two small loreals ; frontal as long as its distance from the end of the snout or longer, oa long as the parietals; one preocular, in contact with the frontal, with one or two suboculara below; twopostoculars; temporals 2+2 or 2+3; upper labials 8, fifth entering the eye; 4 lower labials in contact with the anterior chin-shields, which are as long as the posterior or a little shorter. Scales in 15 rows, those of the sacral region more or less distinctly keeled. Ventrals 142-151; anal divided; sub-caudals 90-105. Bright green or bronzy olive above, the skin between the scales black; pale green or pale olive beneath, with a yellow line on each side.[2] Total length 26 inches; tail 7.5.

Geographic Range

It is endemic to Southern Western Ghats in Kerala and Tamil Nadu states of South India. Precise records are from Munnar, Anaimalai, Grass Hills National Park, Palni hills, Meghamalai, Periyar Tiger Reserve, Travancore hills, southwards up to Agasthyamalai and Kalakkad Mundanthurai Tiger Reserve. It is a high-elevation species, occurring only above 1300 m, all the way up to 2695 m asl.

Habits and habitat

It is a diurnal, semi arboreal and sometimes terrestrial snake. Males are often green, while females are brown. It mainly feeds mainly on lizards and frogs. It is considered to have a mild venom and is rear-fanged. It is presumed to be ovoviviparous, giving birth to live young ones. Natural history poorly known.

Notes
  1. Srinivasulu, C.; Srinivasulu, B.; Achyuthan, N.S. & Mohapatra, P. (2013). "Ahaetulla dispar". IUCN Red List of Threatened Species. 2013: e.T172589A1347499. doi:10.2305/IUCN.UK.2013-1.RLTS.T172589A1347499.en.
  2. Boulenger, G. A. 1890. Fauna of British India. Reptilia and Batrachia.
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References
  • Boulenger, George A. 1890 The Fauna of British India, Including Ceylon and Burma. Reptilia and Batrachia. Taylor & Francis, London, xviii, 541 pp.
  • Günther, A. 1864 The Reptiles of British India. London (Taylor & Francis), xxvii + 452 pp.
  • Chandramouli, S. R., & Ganesh, S. R. (2011). Herpetofauna of southern Western Ghats, India–reinvestigated after decades. TAPROBANICA: The Journal of Asian Biodiversity, 2(2).
  • Ganesh, S. R., Bhupathy, S., David, P., Sathishkumar, N., & Srinivas, G. (2014). Snake fauna of High Wavy Mountains, Western Ghats, India: species richness, status, and distribution pattern. Russian Journal of Herpetology, 21(1), 53–64.


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