|Scientific Name:||Ahaetulla dispar|
|Species Authority:||(Günther, 1864)|
Dryophis dispar (Günther, 1864)
Tragops dispar Günther, 1864
|Taxonomic Notes:||Ahaetulla dispar was described by Günther in 1864 as Tragops dispar based on specimens collected from Anaimalai Hills, Western Ghats (Smith 1943).|
|Red List Category & Criteria:||Near Threatened ver 3.1|
|Assessor(s):||Srinivasulu, C., Srinivasulu, B., Achyuthan, N.S. & Mohapatra, P.|
|Reviewer(s):||Bowles, P., Deepak, V., Kulkarni, N.U., Sawant, N.S., Shankar, G., Aengals, A., Thakur, S., Vyas, R., Jose, J. & Molur, S.|
The species has an extent of occurrence little less than 14,000 km2 , and habitats outside protected areas where it occurs are suffering a continuing decline due to the expansion of commercial plantations. Although considered to occur at three locations defined by this threat, it is listed as Near Threatened rather than Vulnerable as it occurs in protected areas and is subject to no threats in the northern part of its range. Almost qualifies as threatened under criterion B1ab(iii).
|Range Description:||Ahaetulla dispar is endemic to the wet, cool montane tracts of India's Western Ghats and has been reported from Nilgiri Hills, Tamil Nadu to Cardamom Hills, Kerala (Hutton 1949, Ishwar et al. 2001, Kumar et al. 2002, Whitaker and Captain 2004, Hutton and David 2008). A report from Coorg in Karnataka requires confirmation; this is provisionally considered valid and is included in this assessment. It has been recorded from 609 to 1,981 m asl.|
Native:India (Kerala, Tamil Nadu)
|Continuing decline in area of occupancy (AOO):||Unknown|
|Extreme fluctuations in area of occupancy (AOO):||Unknown|
|Estimated extent of occurrence (EOO) - km2:||13894|
|Continuing decline in extent of occurrence (EOO):||Unknown|
|Extreme fluctuations in extent of occurrence (EOO):||Unknown|
|Number of Locations:||3|
|Lower elevation limit (metres):||609|
|Upper elevation limit (metres):||1981|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species is common where it occurs.|
|Current Population Trend:||Unknown|
|Habitat and Ecology:||Ahaetulla dispar occurs in fringes of semi evergreen hill forest and shola patches. It is diurnal and usually encountered on grass clumps, on shrubs and on trees. It feeds on lizards, frogs and other snakes. It is ovoviviparous, with a brood size of 4-11 young (Whitaker and Captain 2004).|
|Continuing decline in area, extent and/or quality of habitat:||Unknown|
|Use and Trade:||The species is not in use.|
|Major Threat(s):||This species is considered to occur in three locations (one above the Palghat Gap and two below), where the sets of threat (both directly to the species and to its habitats) differ. Outside of protected areas, in the southern part of its range, this species is threatened by habitat conversion through expansion of agriculture (cardamom and pepper). Animals are killed on sight by local people.|
|Conservation Actions:||There are no known species-specific conservation measures in place for this species. It occurs in many protected areas, including Nilgiri Biosphere Reserve, Kalakkad-Mundanthurai Tiger Reserve in Tamil Nadu; Periyar Tiger Reserve and Eravikulam National Park in Kerala. Further survey work is needed to understand its biology, ecology, population status and trends.|
Hutton, A.F. 1949. Notes on the snakes and mammals of the High Wavy Mountains, Madura district, S. India. Part I – Snakes. Journal of the Bombay Natural History Society 48(3): 454–460.
Hutton, A.F. and P. David. 2008. Note on a collection of snakes from south India, with emphasis on the snake fauna of the Meghamalai hills (High Wavy Mountains). Journal of the Bombay Natural History Society 105(3): 299-316.
Ishwar, N.M., Chellam, R. and Kumar, A. 2001. Distribution of forest floor reptilies in the rainforest of Kalakad-Mundanthurai Tiger Reserve, South India. Current Science 80(3): 413-418.
IUCN. 2013. IUCN Red List of Threatened Species (ver. 2013.1). Available at: http://www.iucnredlist.org. (Accessed: 12 June 2013).
Kumar, A., Chellam, R., Choudhury, B.C., Mudappa, D., Vasudevan, K., Ishwar, N.M. and Noon, B. 2002. Impact of rainforest fragmentation on small mammals and herpetofauna in the Western Ghats, South India. Wildlife Institute of India.
Smith, M.A. 1943. The Fauna of British India, Ceylon and Burma, including the whole of the Indo-Chinese region. Vol. III. Serpentes. Taylor and Francis, London.
Whitaker, R. and Captain, A. 2004. Snakes of India. The Field Guide. Draco Books, India.
|Citation:||Srinivasulu, C., Srinivasulu, B., Achyuthan, N.S. & Mohapatra, P. 2013. Ahaetulla dispar. The IUCN Red List of Threatened Species 2013: e.T172589A1347499. . Downloaded on 06 May 2016.|
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