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The two species of shield-nosed cobras, the Cape coral snake (Aspidelaps lubricus) and the shield-nosed cobra (Aspidelaps scutatus) [4]: p.76 The two species of black desert cobras or desert black snakes, Walterinnesia aegyptia and Walterinnesia morgani , neither of which rears upwards and produces a hood when threatened [ 4 ] : p.65
Naja is a genus of venomous elapid snakes commonly known as cobras (or "true cobras"). Members of the genus Naja are the most widespread and the most widely recognized as "true" cobras. Various species occur in regions throughout Africa , Southwest Asia , South Asia , and Southeast Asia .
Indian cobras are oviparous and lay their eggs between the months of April and July. The female snake usually lays between 10 and 30 eggs in rat holes or termite mounds and the eggs hatch 48 to 69 days later. The hatchlings measure between 20 and 30 centimetres (8 and 12 in) in length.
[7] [8] Many snake experts have cited the black mamba and the coastal taipan as the world's most dangerous, albeit not the most venomous snakes. [ 9 ] [ 10 ] [ 11 ] Both species are elapids , and in several aspects of morphology, ecology and behavior, the coastal taipan is strongly convergent with the black mamba.
For most of the twentieth century, all Asiatic cobras were considered to be subspecies of the Indian cobra (Naja naja); during this period, the subspecific names N. naja oxiana and N. naja caeca were applied to plain-scaled populations of N. naja from the north of India as well as populations corresponding to the Caspian cobra. Highly variable ...
The forest cobra is Africa's largest cobra of the genus Naja [8] and possibly the largest of all the true cobra (Naja) species in the world. [7] [19] The length of an average adult is 1.4 to 2.2 m (4.6 to 7.2 ft), and they regularly attain lengths of 2.7 m (8.9 ft), [8] [20] and lengths up to 3.2 m (10 ft) have been recorded in the wild.
The king cobra (Ophiophagus hannah) is a species complex of snakes endemic to Asia.With an average of 3.18 to 4 m (10.4 to 13.1 ft) and a record length of 5.85 m (19.2 ft), [2] it is the world's longest venomous snake and among the heaviest.
Venoms of the water cobras were assayed for lethality, proteolytic activity and protein content. Naja annulata annulata and Naja christyi venoms averaged 89% protein and lacked proteolytic activity. The murine intraperitoneal LD 50 of N. a. annulata and N. christyi venoms were 0.143 and 0.120 mg/kg, respectively.