
The Indian cobra is classified under the genus Naja of the family Elapidae. The genus was first described by Josephus Nicolaus Laurenti in 1768.] The species Naja naja was first described by the Swedishphysician, zoologist, and botanist Carl Linnaeus in 1758.The genus Naja was split into several subgenera based on various factors, including morphology, diet, and habitat. Naja naja is part of the subgenus Naja, along with all the other species Asiatic cobras, including Naja kaouthia, Naja siamensis, Naja sputatrix, and the rest. Naja naja is considered to be the prototypical cobra species within the subgenus Naja, and within the entire genus Naja. All Asiatic species of Naja were considered conspecific with Naja naja until the 1990s, often as subspecies thereof. Many of the subspecies were later found to be artificial or composites. This causes much potential confusion when interpreting older literature.
The Indian cobra or spectacled cobra, being common in South Asia, is referred to by a number of local names deriving from the root of Nag (नाग) (Hindi, Marathi) (નાગ)(Gujarati), Moorkhan, മൂര്ഖന് (Malayalam), Naya-නයා (Sinhalese), నాగు పాము (Nagu Paamu) (Telugu), ನಾಗರ ಹಾವು Nagara Haavu (Kannada),Nalla pambu (நல்ல பாம்பு) (Tamil) "Phetigom" (Assamese) and Gokhra (গোখরো) (Bengali)."ଗୋଖର ସାପ/ନାଗ ସାପ" in (Odia)
Description
Spectacle pattern on a snake's hood.
False Eyes of the Binocellate Cobra
Albino Naja naja
The Indian cobra varies tremendously in colour and pattern throughout its range. The ventral scales or the underside colouration of this species can be grey, yellow, tan, brown, reddish or black. Dorsal scales of the Indian cobra may have a hood mark or colour patterns. The most common visible pattern is a posteriorly convex light band at the level of the 20th to 25th ventrals. Salt-and-pepper speckles, especially in adult specimens, are seen on the dorsal scales. Specimens, particularly those found in Sri Lanka may exhibit poorly defined banding on the dorsum. Ontogenetic colour change is frequently observed in specimens in the north-western parts of their geographic range (southern Pakistan and north-western India). In southern Pakistan, juvenile specimens may be grey in colour and may or may not have a hood mark. Adults on the other hand are typically uniformly black in colour on top (melanistic), while the underside, outside the throat region, is usually light. Patterns on the throat and ventral scales are also variable in this species. The majority of specimens exhibit a light throat area followed by dark banding, which can be 4–7 ventral scales wide. Adult specimens also often exhibit a significant amount of mottling on the throat and on the venter, which makes patterns on this species less clear relative to patterns seen in other species of cobra. With the exception of specimens from the north-west, there is often a pair of lateral spots on the throat where the ventral and dorsal scales meet. The positioning of these spots varies, with north-western specimens having the spots positioned more anterior, while specimens from elsewhere in their range are more posterior. Many specimens exhibit a hood mark. This hood mark is located at the rear of the Indian cobra's hood. When the hood mark is present, are two circular ocelli patterns connected by a curved line, evoking the image of spectacles.
The Indian cobra is a moderately sized, heavy bodied species. This cobra species can easily be identified by its relatively large and quite impressive hood, which it expands when threatened. This species has a head which is elliptical, depressed, and very slightly distinct from neck. The snout is short and rounded with large nostrils. The eyes are medium in size and the pupils are round. The majority of adult specimens range from 1 to 1.5 metres (3.3 to 4.9 ft) in length. Some specimens, particularly those from Sri Lanka, may grow to lengths of 2.1 to 2.2 metres (6.9 to 7.2 ft), but this is relatively uncommon.
Indian spectacled cobra (Naja naja)
A 6.5 ft cobra captured in a village near Patnagarh town of Odisha
state of India
Scalation
Dorsal scales are smooth and strongly oblique. Midbody scales are in 23 rows (21–25), with 171–197 ventrals. There are 48–75 divided subcaudalsand the anal shield is single. There are 7 upper labials(3rd the largest and in contact with nasal anteriorly, 3rd and 4th in contact with eye) and 9-10 lower labials (small angular cuneate scale present between 4th and 5th lower labial), as well as 1 preocular in contact with internasals, and 3 postoculars. Temporals are 2 + 3.
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