Species of snake
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"Common names: Dinnik's viper, Caucasus subalpine viper."
Vipera dinniki is a viper species native to the Caucasus Mountains region, part of Russia, Georgia, and Azerbaijan. Like all other vipers, it is venomous. No subspecies are currently recognized.
Etymology.
The specific name, "dinniki", is in honor of Russian herpetologist .
Description.
Of the 49 Russian specimens of "V. dinniki" examined by and (1990), 29 were males, and the largest male measured in total length (including tail). Of the 20 females, the largest was in total length.
Geographic range.
"Vipera dinniki" is found from Russia (Great Caucasus) and Georgia (high mountain basin of the Inguri River), eastward to Azerbaijan.
According to Nikolsky (1916), the type locality is "upper reaches of the Malaya Laba 8000 feet [2438 m] above sea level ... and Svanetia, 7000 feet [2134 m] above sea level." According to et al. (1995), et al. (1986) restricted the type locality to "Malaya Laba" through lectotype selection. Orlov and Tuniyev (1990) give the lectotype locality as "Upper reaches of the Mala (Small) Laba River, Northern Caucasus".
Habitat.
The preferred natural habitats of "V. dinniki" are forest, shrubland, grassland, and rocky areas, at altitudes of .
Reproduction.
"V. dinniki" is viviparous. Mating occurs in April and May, and young are born in August and September. Litter size is 3–7 newborns.
Conservation status.
This species, "V. dinikki", is classified as vulnerable according to the IUCN with the following criteria: B1ab(iii,v) (v3.1, 2009). This indicates, that the population occupies a severely fragmented area over a range of less than 20,000 km2 (7,772 mi 2). A continued decline in habitat size or quality and in population is expected.
References.
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Further reading.
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